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GB/T 20671.5-2020
非金属垫片材料分类体系及试验方法 第5部分:垫片材料蠕变松弛率试验方法
Classification system and test methods for nonmetallic gasket materials—Part 5: Standard test method for creep relaxation of gasket materials
GB/T 8704.5-2020
Ferrovanadium—Determination of vanadium content—The ammonium ferrous sulfate titrimetric method and the potentiometric titrimetric method
GB/T 38783-2020
Method of coating thickness determination for precious metal composites by scanning electron microscope
GB/T 11022-2020
Common specifications for high-voltage alternating-current switchgear and controlgear standards
GB/T 23258-2020
Standard practice controlling internal corrosion in steel pipelines and piping systems
GB/T 39559.1-2020
Specifications for operational monitoring of urban rail transit facilities—Part 1: General
GB/T 39605-2020
Test method for measuring the evaporative resistance of clothing—Sweating manikin method