free milling

例句：

1. 1. The machine has been designedto perform free milling operations.
   这台机器被设计用来执行自由磨削操作。
2. 2. Free milling is a technique usedin woodworking to remove excess material withoutdamaging the workpiece.
   自由磨削是一种木工技术，用于去除多余的材料而不损坏工件。
3. 3. In free milling, thetool rotates at a high speed andmoves in a circular motion, removing materialfrom the workpiece.
   在自由磨削中，工具以高速旋转并沿圆周运动，从工件上去除材料。