chromiumn.铬
chromiumcoppern.铬铜
chromium alloy铬合金
chromium glass铬玻璃
chromium dregs铬渣
chromium metal金属铬
chromium platen.涂铬层
chromium salts铬盐
chromium irons铬铁合金
chromium cation铬离子
chromium humate腐殖酸铬