$10
Drilling weight indicating system
全国石油天然气标准化技术委员会
本标准规定了石油钻井指重表的产品分类、要求、试验方法、检验规则、标志、包装、运输和贮存。本标准适用于以C型弹簧管为感压元件,利用指针在标度盘上指示其值的石油钻井指重表(以下简称指重表)的制造、检验和质量评价。
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