Vanadium seldom forms mineral deposit. It is mainly exist in vanadium titanomagnetite coal gangue and claystone.钒一般很少单独形成矿床, 它主要赋存于钒钛磁铁矿、石煤矿、粘土岩中.Coupled unsaturated flow in claystone has high effect on strength and stab...

黏土石，黏土岩...

claystone的音标：claystone的英式发音音标为：[k'leɪstəʊn]claystone的美式发音音标为：[k'leɪstoʊn]...