短語詞組短語dry coal -dressing machine 干選機(jī)coal dressing waste water 選煤廢水Coal Washing and Dressing 洗煤;煤炭洗選加工coal dressing device 選煤設(shè)備coal dressing methods 選煤方法coal dressing method 選煤方法dry coal dressing 干法選煤Coal dressing mechanism 選煤機(jī)理coal dressing flotation machine 選煤浮選機(jī) 返回 coal dressing