contact wear

例句：

1. 1. The contact wear on the machine was significant after just one day of use.
   这台机器在使用一天后，接触磨损很明显。
2. 2. The engineers were concerned about the potential for contact wear in this new design.
   工程师们担心这个新设计中可能存在接触磨损的风险。
3. 3.The company has invested heavily in research and development to reduce contact wear in its machinery.
   该公司大力投资研发，以减少其机械的接触磨损。