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 mining staff煤炭工业人才coal supply chain煤炭供应链Coal- tar pitch煤沥青coal mine laneway煤矿巷道coal metamorphism煤变质coal seam profile煤层剖面coal gas pipeline煤气管线coal exploitation煤炭开发coal goes against煤顶coalescent theory中性溯祖理论