阀门材质材料英汉术语阀门材质- 钢铁材料copper 合金?cast steel 铸钢?Steel Casting iron? o 碳素钢铸件 碳素钢铸件Fine Steel Casting iron?优质碳素钢Stainless steel? o 不锈钢 不锈钢Stainless acid-resisting steel?不锈耐酸钢Chromium-molybdenum