mechanical rust removing

例句：

1. 1. The machine's mechanical rust removing system is quite effective.
   这台机器的机械除锈系统相当有效。
2. 2. To prevent mechanical rust, it's important to regularly clean the metal parts.
   为了防止机械锈蚀，定期清洁金属部件是很重要的。
3. 3. The engineer used a chemical agent to remove the mechanical rust from the old car.
   工程师使用一种化学剂来从旧车中去除机械锈。