In this paper, the equation of the projection of hob helicoid has also been deduced and the projection is compared with the basic rack nomal profile. 文中还求出了滚刀螺旋面的投影方程式，并与媒介齿条法面齿廓方程做了比较。
The modifications of gear tooth profiles like tooth thickness, tooth tip and edge chamfers and root fillet radius are easily manipulated in a editing window. 如齿厚，齿尖和边缘倒角及根圆角半径齿轮齿廓的修改很容易操纵的编辑窗口。
Seal special-purposly in tooth shape. 齿形专用封口。
Then, a theoretical foundation is established for gear generation with arbitary profile. 从而为范成法加工任意齿形的齿轮奠定了理论基础。
