ring goal

• 投环；套圈

ring goal的用法和样例：

例句

1. The hole size is limited by the ring thickness.
   螺孔的大小受套圈厚度的限制。
2. Inner raceway grinding is more difficult in bearing ring production.
   轴承内圆磨削加工是轴承套圈磨削加工比较困难的工序。