rack control shaft

例句：

1. 1. The engineer adjusted the rack control shaft to optimize performance.
   工程师调整了控制杆轴以优化性能。
2. 2.During maintenance, the technician replaced the control shaft with a new one.
   在维护期间，技术人员用一个新的控制轴替换了旧的。
3. 3. The control shaft is crucial for maintaining the balance of the machine.
   控制轴对于保持机器平衡至关重要。