hexavalent什么意思？

hexavalent的音标：hexavalent的英式发音音标为：[ˌheksə'veɪlənt]hexavalent的美式发音音标为：[ˌheksə'veɪlənt]...

The adsorption of hexavalent chromium by in solubilized humic acid was investigated.研究了不溶性腐殖酸对六价铬的吸附作用.Can determine a chemical into the EU limit for hexavalent chromium test instructions.可用化学法进一部确定,欧盟针对六价铬的测试限量指令.Hexava...