pistor ring inserter

例句：

1. 1. Thepistor ring inserter is usedto insert the metal rings into the holesin the wall.
   圆环插入器用于将金属环插入墙壁的孔中。
2. 2. Thepistor ring inserter was inventedby a man named John Smith.
   圆环插入器是由名叫约翰·史密斯的人发明的。
3. 3. The pistor ring inserteris an essential tool for installing wall platesand other decorative elements.
   圆环插入器是安装壁板和其他装饰元素所必需的工具。