Coaltonn.科尔顿(在美国;西经 82º37' 北纬 39º06')
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal combustible煤的可燃成分
coal legislation煤炭法制
coal coke cutter煤焦切焦器
coal methane gas煤层气
coal petrography煤岩相学,煤岩石学
coal seam tunnel煤层巷道
coal as received入厂煤
coal gas recover煤气回收
coal mining rate采出率
coal mine worker煤矿工人