steering knuckle king pin dust washer

例句：

1. 1. The car's steering knuckle is worn out.
   这辆车的转向节磨损了。
2. 2. The king pin in the door is loose.
   门上的销子松动了。
3. 3. The oil washer on the engine needs to be replaced.
   发动机上的油封需要更换。