Coalla科阿利亚
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coalcombustion燃煤源
coal-tar dye煤焦油染料, 苯胺染料
coal mine city煤城
coalfield fire煤田火灾
coal - saving节煤
coal tar colour煤焦油颜料
coal seam floor煤层底板
coalfield fires煤田火区
coal extraction采煤
coal-tar dyes煤焦油染料