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亜鉛メッキ鋼管と管継手には、それぞれ独自の規格があるのでしょうか?

2018-02-02View Original

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亜鉛メッキ鋼管と管継手には、それぞれ独自の規格があるのでしょうか?
Reply #22018-02-02
亜鉛メッキ管 **規格および寸法規格 GB/T3091-2015 低圧流体輸送用溶接鋼管 GB/T13793-2008 直縫電気溶接鋼管 GB/T21835-2008 溶接鋼管の寸法および単位長さあたりの重量
Reply #32018-02-04
GB/T3091-2015 低圧流体輸送用溶接鋼管

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