This standard is the metallographic structure classification standard for ferritic malleable cast iron. This standard is mainly used to guide production, improve technology and improve quality. When the test bar cannot be used as the basis for quality assessment according to GB 978-67 "Classification and Technical Conditions for Malleable Iron Castings" due to casting defects or other reasons, after consultation and agreement between the production and use departments, the selected metallographic structure is allowed to be used as the acceptance condition. JB/T 2122-1977 Ferritic Malleable Cast Iron Metallographic JB/T2122-1977 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T2122
Chicken cheek horn
Wheel horn
Jicken cheek horn
Art horn
1977-10-01 Small cable
Chicken cheek horn heron Wa art knife
Class shoulder grief
Chicken cancer snake floating beard neck
Feeding the Royal Family
Harrier cheek horn duck Wa
Wheel horn
Rice nitrate fruit
JB/T21221977
Therapeutic charm Ji Quail Russia
Bombardment chicken x
Second rough one fill 100 Camel seconds
Crane sunflower meal
1 Township 1~5 seconds
1977-10-01
Yan Jifa
Village 6~10 seconds
Ci Zui Jia
Species Gan Su She Lun Song
Gingival implants
JB/T2122
Li 4100b
Pei musk filling seconds
Seconds rough square 100 camel seconds
Mouth β natural
JB/T21221977
General Korean 15%
Winning 15% Yellow
Ba General Korean 15%
General Korean 15%
Broadband type paralysis
Wind pot type paralysis
Leng Gaoju Jing Huang
Mouth Gaoju sheath tyrant Huang
Fire letter type paralysis
Li 9100b
1% yellow friend
Leng fin Zhu
311~13 seconds
Du Ran lie type
JB/T2122
10100b
Second rough square fill 100 camel seconds
Leng Zhu ray disease ray
Leng Rong Korean ray giant fish
General fish||tt| |Coconut 11100b
Na 12100b
JB/T2122
414~17 seconds
Plant withdrawal
110~150
70~110
Village 14100b
seconds rough camel matrix 100 camel seconds
Mainland Village 14 phlegm
Mainland Village 15
Mainland Village 16
Mainland Village 17
Depression 15 phlegm
Mainland Village 17 disease
Mainland Village 15100b
Xin comb disaster
Xin grate disaster
Ci Yu grate Song
Li 18100b
Yu Xian catfish
Xiao grate Ji swear grate
Tai swear tun Xian Jiao
JB/T2122
Xin grate Xin grate
Xin grate Xin grate
De Zhiran class
17100b
518 Ke 19 seconds
Xiang 19100
6 Xiang 20~23 seconds
Second rough 100 seconds
Ru 22100b
JB/T2122
Replace the grate with drink
Substitute grate offering hallbZxz.net
Submerged grate offering hall
Substitute grate offering
Submerged grate hall
Buttocks offering catfish
Class 20
Class 20
Class 21
Class 22
Na 21
Na 22
Li 23
Class 23
Na 21100b
23100b
7 Xin grate
Xiao grate Xin grate
24 treatment 25
24 pain 25
JB/T2 1221977
7 parrot 24 family 25 seconds
Du rough one square 100 sheath
Crate catfish
Vegetable reclamation filling Zheng
Angry category x16
Xin comb match catfish category Na 24 knot township 25 phlegm
Xin comb match age one category Na 24 treatment 25 phlegm
Yu An Guo
Han seconds slag
Suitable narrow head
Class Xi marrow
Shen Ye phlegm
JB/T2122
Color wheel
Moss seconds Ci meal fat
For tendon Xin marrow
Leng Lu match catfish Xin||tt ||Class I disease 0.02
No. Korean food
Rough smoked
Planting Shenye
Spicy neck seconds
Chicken is the body of the charm
Planting Yiju
One Gu Tan
Italian Tanran type goose
Long Xiaoyu Tan fruit goose seconds Township 1~8 seconds
JB/T2122
Table Xing Yuandian
Mai Pi Ju Yuandian
Total epidermal thickness
Italian Huai Shun Sui sheath Guan
JB/T2122
Epidermal thickness
Installation skin training degree
Installation skin thick health
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