chalk soil 中文意思是什麼
chalk soil
解釋
白堊土-
Remove corrosive salts, chalk marks, soil or other contaminants and foreign matter by brushing the steel with a stiff fiber or wire brush or a combination of both
用硬纖維、鋼絲刷或二者之一擦拭鋼材表面除去附著的銹鹽、粉斑、油跡及其他污染物。 -
Lake chalk raw soil
湖積白堊粗質土
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