air operated valve grinder

例句：

1. 1.This air-operated valve grinder is very efficient in cleaning the pipelines.
   这个气动阀门研磨机在清洁管道方面非常高效。
2. 2. The engineer used this air-operated valve grinder to replace the worn out parts of the old valve.
   工程师使用这个气动阀门研磨机来更换旧阀门磨损的部分。
3. 3. The air-operated valve grinder was a lifesaver for the maintenance team, as it allowed them to quickly and easily remove stubborn debris from the pipes.
   这个气动阀门研磨机对维护团队来说是一个救星，因为它允许他们快速而轻松地从管道中去除顽固的碎片。