circular hole

• 圆孔

circular hole的用法和样例：

例句

1. The stress concentration near hole is investigated in detail by submodel technique.
   获得了圆孔不同分布状态下的应力分布规律和变形状况。
2. A circular opening in an opaque screen transmits only a small circular patch of a wave surface.
   不透明屏上一个圆孔仅仅透射波面的一小圆块。