... crushing all kinds of steel scrap, copper scrap, aluminum scrap, copper , tubes, circ GPX-340 Metal Crushing Machine I General ... crushing all kinds of steel scrap, copper scrap, aluminum scrap, copper , tubes, circuit board materials. Metal crushers are mainly used in ... industry of briquette pressing, smelting, and crushing. This metal scrap crushing machine features big torque, high output, noisess, ...