axle journal head

例句：

1. 1. The axle journal head is the part of the axle that connects the wheel to the axle shaft.
   轴销是连接车轮和轴的轴销部分。
2. 2. The journal head is responsible for guiding the movement of the axle.
   轴销负责引导轴的运动。
3. 3. The journal head needs to be properly lubricated to prevent wear and tear.
   轴销需要适当润滑，以防止磨损。