英语语法分析

This article illustrates its application by the NC programming of gear involutes profile.

并以齿轮渐开线轮廓的数控加工编程为例说明了它的应用。

The mould press prebending adopts involutes types mould and simultaneously fold bending the two edges of plate by steps.

模压式预弯采用渐开线式模具，分步对钢板的两边同时进行折弯。

Following the rules of machining and outspread principle of involutes, the mathematical model of spur gear teeth profile is built.

根据齿轮加工原理及渐开线展开原理，建立了直齿轮齿廓的数学模型。