coalingn.装煤
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal mining method采煤方法
coal mining safety煤矿安全
coal mine's safety课堂实践教学
coal mining rights煤炭采矿权
coal briquete slag型煤炉渣
coal powder burner燃煤器
coal feed quantity给煤量
coal mine accident煤矿事故
coal-tar naphtha煤焦油石脑油
coal sample number煤样编号