Coalla科阿利亚
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal to liquid煤制油
coal-whippern.卸煤工人;卸煤机
coal excavator采煤机
Coal entrprise煤炭企业
coal reservoir煤储层
coal specimens煤样
coal-bed gas煤层气
coal sturcture煤体结构
coal collector析煤器
coal mine fire矿井火灾