cc523pate 发表于 2017-12-26 18:50:18

BS EN 558-2017 Industrial valves — Face-to-face and centre-to-face dimensions

BS EN 558-2017 Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems — PN and Class designated valves


admin 发表于 2017-12-27 17:12:58

谢谢您的分享，金币已奖励!
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