特殊用法cam-driven knockout1.凸轮驱动出坯crossbar knockout1.横杆顶出liquid knockout1.液体撞击pneumatic vibratory knockout1.气动落砂器, 振动落砂器positive knockout1.直接式打料pull-down bar knockout1.下拉式打料杆seed knockout1.(排种装置的)推种器