閥 門VALVE 1. 冶金特種閥門 metallurgy special valve 2. 衛(wèi)生級設(shè)備/配件/閥門sanitary equipment/parts/valve 3. 蝶閥butterfly valve 1】 對夾蝶板閥 Wafer plate valves 2】 襯里碟閥 Lining Butterfly Valves 3】 蝸輪傳動蝶閥 Butterfly Valves with...