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Various types of valves: ball valves, valve plates, valve, closing valves, check valves, Xuan Sefa, Gemo Fa, and so on. It's the main material: stainless steel, cast steel two. 阀门种类多样：球阀，碟阀，闸阀，截止阀，止回阀，旋塞阀，隔膜阀等。它的材质方主要分：不锈钢，铸钢两种。