This standard specifies the technical requirements, inspection, marking, packaging, transportation and storage of DC drive mine hoist converter unit electric control equipment. This standard applies to DC motor electric control equipment (hereinafter referred to as equipment) powered by converter units in friction and winding mine hoists. JB/T 6754.1-1993 DC drive mine hoist electric control equipment Part 1 Unit electric control equipment JB/T6754.1-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T6754.1-1993
Electrical Control Equipment of DC Drive Mine Hoist
Part 1
Published on August 21, 1993
Electrical Control Equipment of Unit
Implementation on October 1, 1993
Ministry of Machinery Industry
Mechanical Industry Standard of the People's Republic of China
Electrical Control Equipment of DC Drive Mine Hoist
Part 1 Electronic Control Equipment of Unit
Subject Content and Scope of Application
JB/T6754.1-1993
This standard specifies the technical requirements, inspection, marking, packaging, transportation and storage of the electronic control equipment of the converter unit of DC drive mine hoist. This standard applies to the electronic control equipment of DC motors powered by converter units in friction and winding mine hoists (hereinafter referred to as equipment).
Referenced standards
GB4720
GB 3797
GB3906
JB3752
Electronic control equipment Part 1 Low-voltage electrical appliances Electric control equipment Electric control equipment
Part 2 Electric control equipment equipped with electronic devices 3-35kV AC metal-enclosed switchgear
Method for compiling product models of electric control equipment
GB12667
3 Terms and terms
3.1 Converter unit
General technical conditions for semiconductor excitation device of synchronous motor Converter unit refers to AC motor driving DC generator, which is mechanically assembled as a whole and mainly plays the role of current conversion, including internal connections and auxiliary parts of mechanical structure. 3.2 Excitation device
Excitation device refers to the excitation of synchronous motor and DC motor in converter unit. 3.3 Lifting control equipment
Lifting control equipment can be low-voltage electrical equipment, or equipment composed of microprocessors or programmable controllers. 3.4 Unit electronic control equipment
The unit electronic control equipment consists of the excitation device, reactor, high and low voltage switch cabinet and lifting control equipment, DC switch and other auxiliary equipment in the converter unit.
3.5 Maximum speed
refers to the maximum speed of the wire rope when the hoist is lifting the rated load. 3.6 Creeping speed
refers to the speed of the wire rope when the hoist is in the creeping section. 3.7 Maintenance speed
refers to the speed of the wire rope when the hoist is repairing the shaft and wire rope. Approved by the State Machinery Industry Bureau on August 21, 1993 and implemented on October 1, 1993
4 Technical requirements
4.1 Model
The equipment model should comply with the provisions of JB3752. 4.2 General conditions of use
JB/T6754.1-1993
Equipment that complies with this standard is to be installed indoors and should work normally under the following environmental conditions. a. The altitude of the installation and use location shall not exceed 1000mb. The ambient air temperature shall not exceed +40℃, and the average temperature within a 24h period shall not exceed +35℃. The lower limit of the ambient air temperature is -5℃:
C. The relative humidity shall not exceed 50% when the maximum temperature is +40℃. At lower temperatures, higher relative humidity is allowed (e.g. 90% at 20℃). However, it should be noted that condensation may occur occasionally due to temperature changes; Note: When condensation occurs in the use area, the manufacturer and the user shall negotiate decondensation measures when placing an order. d. There shall be no excessive dust, acid, salt, corrosive and explosive gases in the air; e. Allowable vibration conditions at the installation foundation: When the vibration frequency range is 10~150Hz, the maximum vibration acceleration shall not exceed 5m/s\; f. For vertically installed equipment, the installation inclination shall not exceed 5%. 4.3 Special use conditions
If it does not meet the above provisions, the user shall negotiate with the manufacturer to resolve it. 4.4 General requirements
General requirements shall comply with the provisions of Article 3.4 of GB3797. 4.5 Electrical performance indicators
4.5.1 Speed ​​regulation range
Speed ​​regulation range D refers to the adjustable range from the highest working speed n to the creeping working speed nin when the control accuracy S is not greater than the specified value under rated load, which is not greater than 20:1.
can be calculated by formula 1
where: D equipment speed range:
the highest working speed that meets the control accuracy, r/minneax
nain—the creeping working speed that meets the control accuracy, r/min. 4.5.2 Control accuracy
The control accuracy S is the percentage of the absolute value of the difference between the actual motor speed nz and the given speed ni under specified conditions and the rated speed n, that is, the instantaneous value of the actual speed, r/min:
where: nz
—the given speed determined by the speed diagram, r/min: n
ne—the rated speed of the motor, r/min.
In the constant speed section, S should be less than 2%; in the acceleration section, S should be less than 5%. 4.6 Equipment composition requirements
: (2)
The equipment power supply should be a dual-circuit power supply line. JB/T6754.11993
The high-voltage cabinet for power supply of synchronous motors in the equipment shall comply with the provisions of GB3906. 4.6.3 The excitation device of synchronous motors in the equipment shall comply with the provisions of GB12667. 4.6.4
The equipment shall meet the requirements of the speed diagram and force diagram of the hoist. The equipment shall meet the speed requirements for hoist maintenance. 4.6.6 The DC output voltage of the excitation device for supplying excitation to the DC generator is continuously adjustable within the range of 0~1.7 times. 4.7 Protection and interlocking
4.7.1 Emergency stop
In the following cases, the safety brake must be reliably operated, the corresponding sound and light alarm signal must be issued and memorized, and the power supply of the lifting DC motor must be disconnected at the same time.
When the hoist speed exceeds 15% of the maximum speed: a.
When the hoist container is over-wound:
When the hoist is in the deceleration stage and the actual speed of the hoist exceeds the speed limit protection range: c.
When the actual running direction of the hoist is opposite to the given direction: d.
When the speed measuring device fails:
When the brake shoe wear exceeds the specified value: g.
When the brake oil is over-pressurized:
When the hoist depth indicator fails:
When the tail rope fails:
When the brake oil circuit is blocked:
When the winding hoist and the wire rope are loosened beyond the specified value When the value is set: k.
When the lifting container is a skip, when the skip is blocked and cannot pass the unloading position smoothly: 1.
When the DC generator excitation is overcurrent and the DC motor excitation is undercurrent: When the lifting motor overload protection is activated: When the lifting motor is blocked:
When the AC and DC power supplies of the control system are abnormal; p.
When the temperature of the converter unit, lifting motor and other equipment exceeds the limit value: q.
When the lifting wire rope slips:
When an emergency stop operation is required on site 4.7.2
Accident stop
In the following cases, the corresponding sound and light alarm signals should be issued. If the hoist is in operation, the hoist will be stopped after the current lifting is completed, and the next start is not allowed. Electrical braking can also be performed to stop the hoist; if the hoist is in parking state, it is not allowed to start, and it can be resumed after the fault is eliminated. a. When the cooling equipment of the converter unit and the hoisting motor fails; b. When the lubricating oil is abnormal;
C. When the brake spring is fatigued;
d. When the temperature of the hoisting motor, converter unit and auxiliary equipment, reactor and other equipment is abnormal: 3
e. When an accident stop is required on site.
4.7.3 Alarm
JB/T 6754.1-1993
When an abnormality occurs in the non-chain part of the equipment, but it does not affect the normal operation of the hoist, an audible and visual alarm signal can be issued, and the driver shall take measures according to the actual situation to decide whether the hoist continues to operate. 4.7.4 Interlocking
a. The safety circuit is allowed to be connected only when the speed setting is zero and the hoist is in the closing position: b. The hoist is allowed to operate only when the hoisting signal is received: c. After the hoist has overwound in a certain direction, it is only allowed to run in the opposite direction of the overwound direction. d. For hoists with two-stage braking, when the power grid is cut off, the two-stage braking should be maintained; after the bucket hoist stops in an emergency during operation, the original driving direction should be memorized, and when the operation is resumed, it should be driven in the original direction. e.
If the running direction needs to be changed during operation, the hoist should be stopped first, and then the driver should manually change the direction of the hoist. 4.7.5 Hoist travel electrical speed limiter
a. When the hoist container reaches the wellhead deceleration point, the deceleration switch operates and sends a deceleration signal, causing the hoist to start decelerating: b. The hoist travel electrical speed limiter generates a given signal with the travel as a function of the travel during the deceleration stage, which serves as the overspeed protection and adjustable gate closed loop monitoring given signal during the deceleration stage:
c. Limit and protect the speed of the hoist container reaching the wellhead to below 2m/s. 4.8 Protection against electric shockbzxz.net
Protection against electric shock complies with the provisions of Article 3.10.1 of GB3797. 4.9 Safety grounding
Safety grounding complies with the provisions of Article 3.10.7.1 of GB3797. Electrical clearance and creepage distance
Electrical clearance and creepage distance shall comply with the provisions of Article 3.7 of GB3797. 1 Insulation resistance and dielectric strength
4.11.1 Insulation resistance
Insulation resistance complies with the provisions of Article 3.8.1 of GB3797. 4.11.2 Dielectric strength
The dielectric strength shall comply with the provisions of Article 3.8.2 of GB3797. 2 Temperature rise
The temperature rise shall comply with the provisions of Article 3.9 of GB3797. 3 Control cabinets and consoles
Except for the protection level of IP2X, the rest shall comply with the provisions of Article 3.12 of GB3797. 5 Inspection
5.1 Inspection classification
Inspection classification shall comply with the provisions of Article 4.1 of GB3797. 5.1.1 Type inspection
Type inspection shall comply with the provisions of Article 4.1.1 of GB3797. 4
Factory inspection
JB/T6754.1-1993
Factory inspection shall comply with the provisions of Article 4.1.2 of GB3797. 5.1.3 Inspection Items
The inspection of medium and high voltage switchgear of equipment shall comply with the provisions of GB3906. The inspection of medium and low voltage switchgear of equipment shall comply with the provisions of GB4720. The excitation device of synchronous motor in equipment shall comply with the provisions of GB12667. The factory inspection and type inspection of DC motor excitation device and auxiliary equipment are shown in the table. For lifting control equipment in the equipment, workers
Inspection items
Appearance inspection
Insulation resistance test
Dielectric strength test
No-load test
Continuous operation test
Low voltage current test
High and low temperature cycle test
Temperature rise test
Noise test
Anti-interference test
Ambient temperature performance test
High temperature storage test
Vibration resistance test
Drop impact test
Transportation test
Electrical performance index test
5.2 Test methods
Type inspection
Factory inspection
The test method of high and low voltage switchgear in the equipment shall comply with the provisions of GB3906. The test methods of low-voltage switchgear in the equipment shall comply with the provisions of GB4720, and the excitation device of the synchronous motor in the equipment shall comply with the provisions and test methods of GB12667
Article 4.2 of GB 3797
Article 4.3 of GB 3797
Article 4.4 of GB3797
Article 5.2.1 of this standard
Article 4.6 of GB 3797
Article 4.7 of GB3797
Article 4.11 of GB 3797
Article 4.10 of GB 3797
Article 4.16 of GB 3797
Article 4.14 of GB 3797
Article 4.13 of GB 3797
Article 4.12 of GB 3797
Article 4.15 of GB 3797
Article 4.17 of GB 3797
Article 4.18 of GB 3797
Article 5.2.2 of this standard
Test methods for lifting control equipment, DC motor excitation device and auxiliary equipment in equipment are shown in the table, no-load test
Only for programmable controller
Only for excitation device
Only for control unit
Only for control unit
Only for control unit
The purpose of no-load test is to check whether the wiring of the equipment is correct and whether the no-load working characteristics of the equipment meet the requirements. 5.2.1.1 The no-load test of the main circuit of the equipment shall be carried out in accordance with the requirements of Article 4.5 of GB3797. 5.2.1.2 The power-on operation test of the control circuit shall be carried out in accordance with the requirements of Article 5.4.3 of GB4720. The adjustment of electrical components shall be carried out in accordance with the requirements of Article 5.2.1 of GB4720.
No-load test of excitation device
JB/T 6754.11993
During the no-load test, the power supply voltage of the device shall be the rated value. The output end of the device can be open circuit or connected to a load of appropriate impedance so that its output maintains the current required for device commissioning. Assess the continuous adjustability of the output DC voltage of the device (see Article 4.6.6). 5.2.2 Electrical performance index test
The purpose of the electrical performance index test is to test whether the various electrical performance indicators of the equipment meet the index requirements specified for the equipment on the basis of the qualified no-load test
The electrical performance index test is carried out at the operating site of the equipment. During the test, only the hoist is tested under no-load and rated load, and operates according to the lifting speed diagram, and the following electrical performance indicators are tested. 5.2.2.1 Speed ​​regulation range
The speed regulation range is measured in accordance with Article 4.5.1 of this standard. The speed measurement can be carried out by a digital tachometer
5.2.2.2 Control accuracy
The measurement control accuracy shall comply with Article 4.5.2 of this standard. The speed measurement can be carried out by a digital tachometer
, marking, packaging, transportation and storage
The equipment shall comply with the relevant provisions of Chapter 5 of GB3797. Additional notes:
This standard is proposed and managed by Tianjin Electric Drive Design Institute. This standard was drafted by Xiangtan Traction Electrical Equipment Research Institute, Tianshui Electric Drive Research Institute, Luoyang Mining Machinery Engineering Design Institute, Shanghai Complete Electric Appliance Factory and other units.
The main drafters of this standard: Zhou Kainan, Wang Shouyong, Yang Zaiming, Jiang Xiancang, Dai Jie. 6
People's Republic of China
Mechanical Industry Standard
DC Drive Mine Hoist Electronic Control Equipment
Part 1 Unit Electronic Control Equipment
JB/T 6754.11993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Format 880x1230
Edition X, XX month, 19XX
Print run 1-xXx
Postal code 100044)
Printed sheets X/X
Word count xxX, XxX
Print run X, xX month, 19XX
Price XXX.XX Yuan
xx-xxx
Mechanical Industry Standards Service Network: http://wwwJB.ac.cnJ3 Inspection Items
The inspection of medium and high voltage switchgears of equipment shall comply with the provisions of GB3906. The inspection of medium and low voltage switchgears of equipment shall comply with the provisions of GB4720. The excitation device of synchronous motors in equipment shall comply with the provisions of GB12667. The factory inspection and type inspection of DC motor excitation devices and auxiliary equipment are shown in the table. For lifting control equipment in the equipment, workers
Inspection items
Appearance inspection
Insulation resistance test
Dielectric strength test
No-load test
Continuous operation test
Low voltage current test
High and low temperature cycle test
Temperature rise test
Noise test
Anti-interference test
Ambient temperature performance test
High temperature storage test
Vibration resistance test
Drop impact test
Transportation test
Electrical performance index test
5.2 Test methods
Type inspection
Factory inspection
The test method of high and low voltage switchgear in the equipment shall comply with the provisions of GB3906. The test methods of low-voltage switchgear in the equipment shall comply with the provisions of GB4720, and the excitation device of the synchronous motor in the equipment shall comply with the provisions and test methods of GB12667
Article 4.2 of GB 3797
Article 4.3 of GB 3797
Article 4.4 of GB3797
Article 5.2.1 of this standard
Article 4.6 of GB 3797
Article 4.7 of GB3797
Article 4.11 of GB 3797
Article 4.10 of GB 3797
Article 4.16 of GB 3797
Article 4.14 of GB 3797
Article 4.13 of GB 3797
Article 4.12 of GB 3797
Article 4.15 of GB 3797
Article 4.17 of GB 3797
Article 4.18 of GB 3797
Article 5.2.2 of this standard
Test methods for lifting control equipment, DC motor excitation device and auxiliary equipment in equipment are shown in the table, no-load test
Only for programmable controller
Only for excitation device
Only for control unit
Only for control unit
Only for control unit
The purpose of no-load test is to check whether the wiring of the equipment is correct and whether the no-load working characteristics of the equipment meet the requirements. 5.2.1.1 The no-load test of the main circuit of the equipment shall be carried out in accordance with the requirements of Article 4.5 of GB3797. 5.2.1.2 The power-on operation test of the control circuit shall be carried out in accordance with the requirements of Article 5.4.3 of GB4720. The adjustment of electrical components shall be carried out in accordance with the requirements of Article 5.2.1 of GB4720.
No-load test of excitation device
JB/T 6754.11993
During the no-load test, the power supply voltage of the device shall be the rated value. The output end of the device can be open circuit or connected to a load of appropriate impedance so that its output maintains the current required for device commissioning. Assess the continuous adjustability of the output DC voltage of the device (see Article 4.6.6). 5.2.2 Electrical performance index test
The purpose of the electrical performance index test is to test whether the various electrical performance indicators of the equipment meet the index requirements specified for the equipment on the basis of the qualified no-load test
The electrical performance index test is carried out at the operating site of the equipment. During the test, only the hoist is tested under no-load and rated load, and operates according to the lifting speed diagram, and the following electrical performance indicators are tested. 5.2.2.1 Speed ​​regulation range
The speed regulation range is measured in accordance with Article 4.5.1 of this standard. The speed measurement can be carried out by a digital tachometer
5.2.2.2 Control accuracy
The measurement control accuracy shall comply with Article 4.5.2 of this standard. The speed measurement can be carried out by a digital tachometer
, marking, packaging, transportation and storage
The equipment shall comply with the relevant provisions of Chapter 5 of GB3797. Additional notes:
This standard is proposed and managed by Tianjin Electric Drive Design Institute. This standard was drafted by Xiangtan Traction Electrical Equipment Research Institute, Tianshui Electric Drive Research Institute, Luoyang Mining Machinery Engineering Design Institute, Shanghai Complete Electric Appliance Factory and other units.
The main drafters of this standard: Zhou Kainan, Wang Shouyong, Yang Zaiming, Jiang Xiancang, Dai Jie. 6
People's Republic of China
Mechanical Industry Standard
DC Drive Mine Hoist Electronic Control Equipment
Part 1 Unit Electronic Control Equipment
JB/T 6754.11993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Format 880x1230
Edition X, XX month, 19XX
Print run 1-xXx
Postal code 100044)
Printed sheets X/X
Word count xxX, XxX
Print run X, xX month, 19XX
Price XXX.XX Yuan
xx-xxx
Mechanical Industry Standards Service Network: http://wwwJB.ac.cnJ3 Inspection Items
The inspection of medium and high voltage switchgears of equipment shall comply with the provisions of GB3906. The inspection of medium and low voltage switchgears of equipment shall comply with the provisions of GB4720. The excitation device of synchronous motors in equipment shall comply with the provisions of GB12667. The factory inspection and type inspection of DC motor excitation devices and auxiliary equipment are shown in the table. For lifting control equipment in the equipment, workers
Inspection items
Appearance inspection
Insulation resistance test
Dielectric strength test
No-load test
Continuous operation test
Low voltage current test
High and low temperature cycle test
Temperature rise test
Noise test
Anti-interference test
Ambient temperature performance test
High temperature storage test
Vibration resistance test
Drop impact test
Transportation test
Electrical performance index test
5.2 Test methods
Type inspection
Factory inspection
The test method of high and low voltage switchgear in the equipment shall comply with the provisions of GB3906. The test methods of low-voltage switchgear in the equipment shall comply with the provisions of GB4720, and the excitation device of the synchronous motor in the equipment shall comply with the provisions and test methods of GB12667
Article 4.2 of GB 3797
Article 4.3 of GB 3797
Article 4.4 of GB3797
Article 5.2.1 of this standard
Article 4.6 of GB 3797
Article 4.7 of GB3797
Article 4.11 of GB 3797
Article 4.10 of GB 3797
Article 4.16 of GB 3797
Article 4.14 of GB 3797
Article 4.13 of GB 3797
Article 4.12 of GB 3797
Article 4.15 of GB 3797
Article 4.17 of GB 3797
Article 4.18 of GB 3797
Article 5.2.2 of this standard
Test methods for lifting control equipment, DC motor excitation device and auxiliary equipment in equipment are shown in the table, no-load test
Only for programmable controller
Only for excitation device
Only for control unit
Only for control unit
Only for control unit
The purpose of no-load test is to check whether the wiring of the equipment is correct and whether the no-load working characteristics of the equipment meet the requirements. 5.2.1.1 The no-load test of the main circuit of the equipment shall be carried out in accordance with the requirements of Article 4.5 of GB3797. 5.2.1.2 The power-on operation test of the control circuit shall be carried out in accordance with the requirements of Article 5.4.3 of GB4720. The adjustment of electrical components shall be carried out in accordance with the requirements of Article 5.2.1 of GB4720.
No-load test of excitation device
JB/T 6754.11993
During the no-load test, the power supply voltage of the device shall be the rated value. The output end of the device can be open circuit or connected to a load of appropriate impedance so that its output maintains the current required for device commissioning. Assess the continuous adjustability of the output DC voltage of the device (see Article 4.6.6). 5.2.2 Electrical performance index test
The purpose of the electrical performance index test is to test whether the various electrical performance indicators of the equipment meet the index requirements specified for the equipment on the basis of the qualified no-load test
The electrical performance index test is carried out at the operating site of the equipment. During the test, only the hoist is tested under no-load and rated load, and operates according to the lifting speed diagram, and the following electrical performance indicators are tested. 5.2.2.1 Speed ​​regulation range
The speed regulation range is measured in accordance with Article 4.5.1 of this standard. The speed measurement can be carried out by a digital tachometer
5.2.2.2 Control accuracy
The measurement control accuracy shall comply with Article 4.5.2 of this standard. The speed measurement can be carried out by a digital tachometer
, marking, packaging, transportation and storage
The equipment shall comply with the relevant provisions of Chapter 5 of GB3797. Additional notes:
This standard is proposed and managed by Tianjin Electric Drive Design Institute. This standard was drafted by Xiangtan Traction Electrical Equipment Research Institute, Tianshui Electric Drive Research Institute, Luoyang Mining Machinery Engineering Design Institute, Shanghai Complete Electric Appliance Factory and other units.
The main drafters of this standard: Zhou Kainan, Wang Shouyong, Yang Zaiming, Jiang Xiancang, Dai Jie. 6
People's Republic of China
Mechanical Industry Standard
DC Drive Mine Hoist Electronic Control Equipment
Part 1 Unit Electronic Control Equipment
JB/T 6754.11993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Format 880x1230
Edition X, XX month, 19XX
Print run 1-xXx
Postal code 100044)
Printed sheets X/X
Word count xxX, XxX
Print run X, xX month, 19XX
Price XXX.XX Yuan
xx-xxx
Mechanical Industry Standards Service Network: http://wwwJB.ac.cnJ2. The speed measurement can be carried out using a digital tachometer. The marking, packaging, transportation and storage equipment should comply with the relevant provisions of Chapter 5 of GB3797. Additional notes: This standard was proposed and managed by Tianjin Electric Drive Design Institute. This standard was drafted by Xiangtan Traction Electrical Equipment Research Institute, Tianshui Electric Drive Research Institute, Luoyang Mining Machinery Engineering Design Institute, Shanghai Complete Electric Appliance Factory and other units. The main drafters of this standard: Zhou Kainan, Wang Shouyong, Yang Zaiming, Jiang Xiancang and Dai Jie. 6
People's Republic of China
Mechanical Industry Standards
DC Drive Mine Hoist Electronic Control Equipment
Part 1 Unit Electronic Control Equipment
JB/T 6754.11993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Format 880x1230
Edition X, XX month, 19XX
Print run 1-xXx
Postal code 100044)
Printed sheets X/X
Word count xxX, XxX
Print run X, xX month, 19XX
Price XXX.XX Yuan
xx-xxx
Mechanical Industry Standards Service Network: http://wwwJB.ac.cnJ2. The speed measurement can be carried out using a digital tachometer. The marking, packaging, transportation and storage equipment should comply with the relevant provisions of Chapter 5 of GB3797. Additional notes: This standard was proposed and managed by Tianjin Electric Drive Design Institute. This standard was drafted by Xiangtan Traction Electrical Equipment Research Institute, Tianshui Electric Drive Research Institute, Luoyang Mining Machinery Engineering Design Institute, Shanghai Complete Electric Appliance Factory and other units. The main drafters of this standard: Zhou Kainan, Wang Shouyong, Yang Zaiming, Jiang Xiancang and Dai Jie. 6
People's Republic of China
Mechanical Industry Standards
DC Drive Mine Hoist Electronic Control Equipment
Part 1 Unit Electronic Control Equipment
JB/T 6754.11993
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Format 880x1230
Edition X, XX month, 19XX
Print run 1-xXx
Postal code 100044)
Printed sheets X/X
Word count xxX, XxX
Print run X, xX month, 19XX
Price XXX.XX Yuan
xx-xxx
Mechanical Industry Standards Service Network: http://wwwJB.ac.cnJ
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