dfygj 发表于 2019-12-16 08:46:22

BS 1873-1975 Steel globe and globe stop and check valves(flanged and butt-weldin


Specification for Steel globe and globe stop and check valves(flanged and butt-welding ends) for the petroleum,petrochemical and allied industries

admin 发表于 2019-12-29 19:59:50

谢谢您的分享，金币已奖励！

ghj0088 发表于 2021-1-20 11:26:24

谢谢分享，很实用，找了很久
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