Coalan.夸拉(在布基纳法索;西经 2º06' 北纬 12º03')
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal wall长壁工作面,采煤工祖
coal char煤焦
coal cost煤炭成本
coal rock煤岩
coal pulp煤浆
coal size粒度
coal slag煤渣
coalescern.聚结剂
coal rank煤级
Coalseams煤层