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我厂工人师傅在技术革新的群众运动中,经过多次试验和改进,制造成功了自紧钻夹头(图1)。现将这种钻夹头简单介绍如下:
I factory workers in the technical innovation of the masses in the mass movement, after many tests and improvements to create a self-tightening drill chuck (Figure 1). This drill chuck is now briefly described as follows: