Deep hole marching

• 深孔加工

Deep hole marching的用法和样例：

例句

1. The promoted design of the rolling tool used in precisely machining deep holes with an effective multiplex boring machine is introduced.
   介绍了高精度深孔加工用高效复合镗滚压工具的改进设计。
2. The paper describes a method that can creat a hole processing program automatically.
   本文介绍了利用工程图自动生成孔加工程序的方法。