qinbo520 发表于 2013-9-10 14:41:47

ASME B16.39 |Malleable Iron Threaded Pipe Unions Classes 150, 250, and 300


编号：bz-1836
标准名称:ASME B16.39 |Malleable Iron Threaded Pipe Unions Classes 150, 250, and 300
标准格式：rar
标准大小：N/A
标准简介：<br />0

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interant 发表于 2013-12-30 14:04:29

我只是初学者啊

fjkong 发表于 2014-8-28 14:57:42

这个得认真研究！！
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