例句與造句

1. The flat belt pulley system is still in existence.
2. They could also be used interchangeably with other forms of power, such as a hand crank, line shaft, stationary engine, or the PTO shaft or flat belt pulley from a tractor, which eventually replaced them.
3. It's difficult to find flat belt pulley in a sentence. 用flat belt pulley造句挺難的