采煤工作面 cǎiméigōngzuòmiàn coalface Definitions Defs Origin Strokes Stroke Words Sentences Sents 采煤工作面 採煤工作面 cǎiméigōngzuòmiàn coalface the exposed surface of a coal seam in a mine where coal is extracted
采煤工作面 採煤工作面 cǎiméigōngzuòmiàn coalface the exposed surface of a coal seam in a mine where coal is extracted
