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 geochemistry煤地球化学coalmining region煤矿区coalescing medium聚结介质coal ignitability煤可燃性,煤自燃倾向性coal seam section煤层区coal caving ratio放出率coal mine exhaust煤矿排气Coal is a fuel.煤是一种燃料。coal gas outburst煤与瓦斯突出coal mine railway煤矿铁路