标准查询 标准查询非螺纹密封连接的管螺纹.第1部分:尺寸、公差和命名.尺寸限值
Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation; Limits of size
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标准查询Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation; Limits of size
