National Standard (GB)下载-第2页-标准下载网-www.bzxz.net

Particle—Size analysis—Color image analysis methods

GB/T 38879-2020
Low impact development stormwater management and harvest—Facility classification

GB/T 38906-2020
Metallic and other inorganic coatings—Phosphate conversion coating of metals

GB/T 11376-2020
Thermal spraying—Procedures for the application of thermally sprayed coatings for engineering components

GB/T 19823-2020
Emergency guidance systems—Setting principles and requirements—Part 1:Inside buildings

GB/T 23809.1-2020
Rules for the presentation of graphical symbols—Part 4:Method for testing symbol referent association

GB/T 16900.4-2020
Cooling summer grades

GB/T 38950-2020
Warm winter grades

GB/T 21983-2020