词汇	回收金属
释义	回收金属 retrieve metals
随便看	coal safety management coal sale coal sale system coal samling coal sampl coal seam dip angle coal seam exploration type coal seam exposure coal seam faults coal seam floor coal sample coal sample ashing coal sample crush coal sample crusher coal sample division coal sample for back-check coal sample for determining total moisture coal sample for gas test coal sample for general analysis coal sample mixing coal sample number coal sample preparation coal sample reduction coal samples coal samples for future reference