Coalen.科尔
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
Coal methane煤层气
coal haulage煤炭运输
coal ash gum粉煤灰凝胶
coal roadway煤巷
coal network煤炭专网
coal in lump块煤
coal tar oil煤焦油
coal heading沿煤层巷道
coalmine gas煤矿瓦斯
coal-hatchn.上煤口