coalboxn.煤箱;发黑烟的炸弹
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal power plants火电厂
coal seam texture煤层结构
coal purification煤净化
coal leveling bar平煤杆
coal mining right煤炭采矿权
coal conservation节煤
coal mine disater煤矿灾难
coal tar solution煤焦油溶液<皮肤科用药>
coal mining craft采煤工艺
coal miner's lung煤肺病