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GB/T 8151.24-2021
锌精矿化学分析方法 第24部分:可溶性锌含量的测定 火焰原子吸收光谱法
Methods for chemical analysis of zinc concentrates—Part 24:Determination of soluble zinc content—Flame atomic absorption spectrometry
GB/T 9966.17-2021
Test methods for natural stone—Part 17: Determination of resistance to salt crystallization
GB/T 9966.12-2021
Test methods for natural stone—Part 12:Determination of static elastic modulus
GB/T 9966.10-2021
Test methods for natural stone—Part 10: Determination of resistance to shaking for individual stone anchoragest
GB 24500-2020
Minimum allowable values of energy efficiency and energy efficiency grades of industrial boilers
GB 19761-2020
Minimum allowable values of energy efficiency and energy efficiency grades for fan
GB/T 39875-2021
Examination methods for chlordiazepoxide in suspected drugs—Gas chromatography and gas chromatography-mass spectrometry
GB/T 39876-2021
Examination methods for cocaine in suspected drugs—Gas chromatography and gas chromatography-mass spectrometry