slow closure type valve 中文意思是什麼
slow closure type valve
解釋
緩閉閥-
General spcification of slow closure type check valve for water supply and sewerage
給排水用緩閉止回閥通用技術要求 -
General specification of slow closure type check valve for water supply and sewerage
給排水用緩閉止回閥通用技術要求
分享友人