cricondenbar

例句：

1. 1. The old car's engine has a lot of cricondenbar on the piston rings.
   这辆旧车的引擎活塞环上有很多铁锈。
2. 2.The paint job on the car looks like it needs some cricondenbar removal.
   这辆车的油漆看起来需要一些铁锈去除。
3. 3.The metal door had a layer of cricondenbar that needed to be sanded off.
   这扇金属门上有一些铁锈，需要打磨掉。