Coalen.科尔
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal bumping冲击地压
coal blending配煤
coal analyzer煤质仪器
coal fracture煤层气
coal adustion煤的可燃性
coal dressing选煤
coal - lane煤巷
coal tar burn煤焦油烧伤
coal leveling平煤
coal switcher矿用开关