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巧对中心的方法如图所示。把一块薄扁料置于棒料工件和刀尖之间。向前摇动横拖板,使刀尖将扁料轻轻地顶在圆棒料上。观察扁料倾斜方向,如扁料处于图B位置,说明刀尖在工
Cleverly center the method as shown. Place a thin slab between the bar workpiece and the tip. Swing the horizontal carriage forward so that the tip of the knife gently pushes the flat material over the round bar. Observe the inclination of the flat material, such as the flat material in Figure B position, indicating the tip in the work