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介绍了一种利用车床的旋转带动刀辅具与车床同步旋转和轴向前后移动，使镗刀匀速运动而进行镗孔的辅具。
This paper introduces a kind of auxiliary tool which makes use of the rotating tool of the lathe to rotate the tool and the lathe synchronously and move back and forth in the axial direction to make the boring tool move at a constant speed to bored.