spot facing machining

• 孔加工

spot facing machining的用法和样例：

例句

1. The paper introduces the construction of the tailstock and the machining process of the bore.
   文中介绍了静压尾架的结构，尾架孔加工工艺。
2. 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。