ring bending machine

例句：

1. 1.This ring bending machine is used for making rings.
   这台环形弯曲机用于制作戒指。
2. 2.The ring bending machine is very efficient in cutting metal.
   环形弯曲机在切割金属方面非常高效。
3. 3. The ring bending machine was invented by a famous engineer.
   环形弯曲机是由一位著名的工程师发明的。