标准查询 标准查询可锻铸铁螺纹管配件.第1部分:与ISO 7-1相一致的内孔直螺纹和外锥螺纹配件
Malleable cast iron threaded pipe fittings; part 1: fittings with parallel internal and taper external threads in accordance with ISO 7-1
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标准查询Malleable cast iron threaded pipe fittings; part 1: fittings with parallel internal and taper external threads in accordance with ISO 7-1
