GB/T 29503-2020.Aluminium alloy stretched plates.1范围GB/T 29503规定了铝合金预拉伸板的要求、试验方法、检验规则和标志、包装、运输、贮存及质量证...
GB/T 38783-2020.Method of coating thickness determination for precious metal composites by scanning electron microscope.1范围GB/T 38783规定了各类贵金属复合材料覆层厚度...
GB/T 8704.10-2020.Ferrovanadium-Determination of silicon,manganese,phosphorus,aluminum ,copper,chromium,nickel and titanium contents-Inductively coupled plasma atomic emission spect...
GB/T 8704.5-2020.Ferrovanadium-Determination of vanadium content-The ammonium ferrous sulfate titrimetric method and the potentiometric titrimetric method.1范围GB/T8704的本部分规...
GB/T 8704.6-2020.Ferrovanadium-Determination of silicon content-The sulfuric acid dehydration gralimetric method and the silicomoly bdic blue photometric method.1范围GB/T 8704的本...
GB/T 38878-2020.System tests for the projects of high-voltage direct current (HVDC) transmission power using voltage sourced converters ( VSC).1范围GB/T 38878规定了柔性直流输...
GB/T 38821-2020.Hetian Yu-Testing and classification.1范围GB/T 38821规定了和田玉的术语和定义、鉴定、分类、命名规则和鉴定证书的基本内容。GB/T 3882...
GB/T 38816-2020.Agate-Beihong agate-Testing.1范围GB/T 38816规定了北红玛瑙的鉴定特征及鉴定方法。GB/T 38816适用于北红玛瑙的原料及产品。2规范性引用...
GB/T 38953-2020.Technical requirements for relay protection of microgrid.1范围GB/T 38953规定了微电网的分布式电源保护、电化学储能保护、变压器保护、并网...
GB/T 38922-2020.General specification for 35 kV and below voltage standardized protection equipment.1范围GB/T 38922规定了变电站内10 kV~35 kV标准化继电保护装置(以下...
