我厂六车间工人在党支部的领导下,开展了“工业学大庆”群众运动,大搞技术革新,技术革命,经过反复试验,终于试验成功了CA 9220车床改为铜保持架自动钻眼机(如图1).改制后,由于前刀架取消了退刀和让刀过程,因此刀架只能前进和后退(如图2). Under the leadership of the party branch, the workers in our six workshops carried out the mass movement of “Daqing Industrial Science and Technology”, made great efforts in technological innovation and technological revolution. After repeated tests, we finally succeeded in changing the CA 9220 lathe into a copper cage automatic drilling machine (Figure 1). After restructuring, because the front knife to cancel the retraction and let the knife process, so the knife can only move forward and backward (Figure 2).