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. 文中還求出了滾刀螺旋面的投影方程式，並與媒介齒條法面齒廓方程做了比較。
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. 如齒厚，齒尖和邊緣倒角及根圓角半徑齒輪齒廓的修改很容易操縱的編輯窗口。
Seal special-purposly in tooth shape. 齒形專用封口。
Then, a theoretical foundation is established for gear generation with arbitary profile. 從而為范成法加工任意齒形的齒輪奠定了理論基礎。
