Scrap wire after breaking through the cable to become broken pieces of plastic and copper meters broken pieces of plastic and copper push airflow meter in the screen box straight suction and exciting dual role separation core leather to make efforts to jump in the screen surface wave front row, copper meters , and a mixture of copper and plastic skin from different plastics spout sent, via a dust collector to the dust duct. (1-20MM processed scrap cable, single conductor diameter 0.2-0.3mm best.)