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GB/T 17389-2013 潜油电泵电缆系统的应用GB/T 17389-2013.Recommended practice for the application of electrical submersible cable system.1范围GB/T 17389规定了潜油电缆导体的结构形式和尺寸、潜油电缆绝缘层.护套、编制层和保护层,不锈钢带...
11/03 2023
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GB/Z 39124-2020 铅精矿化学分析方法锑含量的测定硫酸铈滴定法GB/Z 39124-2020.Method for chemical analysis of lead concentrates-Determination of antimony content-Ce(SO4)2 titration method.1范围GB/Z 39124规定了铅精矿中锑含量的...
11/03 2023
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GB/T 39255-2020 焊接与切割用保护气体GB/T 39255-2020.Gases and gas mixtures for welding and cutting processes.1范围GB/T 39255规定了焊接与切制用保护气体的型号、技术要求、试验方法、复验和供货技术条件等内容.GB/T 39255适用于钨极惰性气体保护电弧焊...
11/03 2023
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GB/T 39533-2020 常压下泡沫水泥浆的制备及试验方法GB/T 39533-2020.Preparation and testing of foamed cement slurries at atmospheric pressure.1范围GB/T 39533规定了常压下泡沫水泥浆及未起泡的基浆的制备及试验方法。GB/T 39533适用于常压下泡沫水泥...
11/03 2023
