a white clay (especially a white clay used by potters)
例句与用法
1.
Manufacturing technique of wax microcrystalline : with crude oil vacuum residua fractions as material , it is made from propane taking off asphaltum , furfural refining , ketone benzene taking off oil , and argil refining 微晶蜡的生产工艺流程:本产品以天然原油的减压渣油为原料，经丙烷脱沥青、糠醛精制、酮苯脱油、白土补充精制及加氢补充精制冷却后成型而制得该系列产品。
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