coalizev.加入联盟
coaln.煤;木炭vt.烧成炭;供应煤vi.加煤;装煤
coal mining gateway回采巷道
coalescent aperture合生纹孔口
coal mining machine采煤机
coal gas wastewater煤气废水
coal and non-coal煤与非煤
coal-cutting drum采煤滚筒
Coal beating strata含煤地层
coal mining combine采煤康拜因
coal mine explosive煤矿炸药
coal mine equipment煤矿设备