flat-imaginary gear

例句：

1. 1. The new flat-imaginary gear has significantly improved the efficiency of the machine.
   新的平的想象齿轮大大提高了机器的效率。
2. 2. The engineer designed a flat-imaginary gear that could be easily replaced without affecting the overall function of the machine.
   工程师设计了一种可以轻易替换而不影响机器整体功能的平的想象齿轮。
3. 3. In the manufacturing process, flat-imaginary gears are often used to reduce friction and improve precision.
   在制造过程中，平的想象齿轮常被用来减少摩擦和提高精度。