killer007 发表于 2017-8-29 16:00:51

BS 10-2009 Specification for flanges and bolting for pipes, valves and fittings

BS 10-2009  Specification for flanges and bolting for pipes, valves and fittings




admin 发表于 2017-8-29 18:54:12

谢谢您的分享,金币已奖励!
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