Wear metal

• 磨损金属

Wear metal的用法和样例：

例句

1. Repair worn parts of metal products by welding on extra layers.
   焊接额外层以修复磨损金属制品的零部件。
2. Because all the gears are enclosed within the hub, road grit can't get inside to abrade the metal parts.
   因为所有的齿轮都套在轮毂内，路面上的砂石不会跑进齿轮之间磨损金属部件。