锋利的切削刃和正前角是要避免。
Sharp cutting edges and positive rake angles are to be avoided.
文中的数学模型亦可用于零前角及正前角齿轮滚刀重磨后的齿形误差计算及修正。
The mathematical model presented in this paper can also be used in the regrinding of gear hobs with zero rake Angle and positive rake Angle for error calculation and revision.
改变正前角成形铣刀只能用作粗加工的观念，可将正前角成形铣刀用于成形面的精加工。
The conception that the form-milling cutter can only be used to rough finish the workpiece should be changed. This kind of form-milling cutter can also be used to finishing-machine workpiece.
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