Coalla科阿利亚coaln.煤；木炭vt.烧成炭；供应煤vi.加煤；装煤coal equivalent煤当量,燃料当量coal conversion煤转换coal-mine pit矿井coal dust index煤尘指数coalmine safety煤矿安全coaly inclusion煤包体coal-tar base煤焦油基coal making gas煤制气coal mine bases煤矿基地coal fracturing煤体破裂