Iso 7-2
在螺纹上形成压力密封连接的管螺纹 — 第2部分:通过极限量规进行验证
Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by means of limit gauges
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Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by means of limit gauges