flat transmission belt

例句：

1. 1. The flattransmission belt is essential for the smooth operationof the machine.
   平传动带对于机器的平稳运行至关重要。
2. 2. The flat transmission belt isused to transfer power from one part ofthe engine to another.
   平传动带用于将发动机的一部分的动力传递到另一部分。
3. 3. Theflat transmission belt is prone to wear andtear, which can affect the performance ofthe machine.
   平传动带容易磨损，这会影响机器的性能。