channel-section axle

例句：

1. 1.The engineer designed the channel-section axle to improve efficiency.
   工程师设计了通道部分轴以提高效率。
2. 2. The construction of the new bridge involved the use of a channel-section axle.
   新桥梁的建设使用了通道部分轴。
3. 3. The axle of the car is made from high-quality steel, ensuring durability and reliability.
   汽车的轴由高质量的钢材制成，确保耐用性和可靠性。