标准查询 标准查询非螺纹密封的管螺纹 第2部分:用极限量规检验
Pipe threads where pressure-tight joints are not made on the threads; Part 2 : Verification by means of limit gauges
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标准查询Pipe threads where pressure-tight joints are not made on the threads; Part 2 : Verification by means of limit gauges
