Pipe threads where pressure tight joints are made on the threads
...螺纹密封接头用管螺纹 第2部分：锥形外螺纹和锥形内螺纹 尺寸、公差和标记 【英文名称】 Pipe threads where pressure tight joints are made on the threads - Part 2: Taper external threads and taper internal threads - Dimensions, toler..
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