ISO 228-1-2000 非螺纹密封连接管螺纹 第1部分:尺寸、公差和标
ISO 228-1-2000 Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation非螺纹密封连接管螺纹 第1部分:尺寸、公差和标注
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