oil hole

• 注油孔

oil hole的用法和样例：

例句

1. There is one oil groove in the bronze bushing, where lubricant can flow into the axis from the oil hole on the cap of housings.
   轴瓦内表面的不承担载荷部分开有油槽，润滑油通过进油孔和邮沟流进间隙。