head tube

例句：

1. 1. The engineer useda special tool to remove the head tubefrom the bike.
   工程师使用特殊工具从自行车上拆下头管。
2. 2. The newdesign of the car has a sleekerhead tube and improved handling.
   这款汽车的新设计拥有更流线型的头管和改进的操控性能。
3. 3. Duringthe race, the teamhad to adjust their head tubes to avoid hitting each other.
   比赛中，团队不得不调整他们的头管以避免相互碰撞。