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如图所示,在蜗杆齿顶圆的圆柱面上,沿轴线方向,用刀尖轻轻画出AB线,将万能角度尺的C尺
As shown in the figure, on the cylindrical surface of the tip of the worm gear, along the axial direction, gently draw the AB line with the blade edge, the universal angle scale C ruler