roller finder

例句：

1. 1.The roller finder helped us quickly locatethe lost document.
   滚筒查找器帮助我们迅速找到了丢失的文件。
2. 2. The engineer used a roller finder to inspect the foundation of the building.
   工程师使用滚筒查找器检查了建筑物的基础。
3. 3.The roller finder was an essential toolfor the archaeologist in their excavation work.
   滚筒查找器是考古学家在挖掘工作中必不可少的工具。