spur-gear wheel

例句：

1. 1. The engine's efficiency is greatly improved by the use of a spur gear wheel.
   使用推进轮大大提高了发动机的效率。
2. 2. The new design uses a more efficient spur gear wheel to reduce fuel consumption.
   新设计使用了更高效的推进器轮来减少燃油消耗。
3. 3. The construction of the ship involved the installation of several spur gear wheels for propulsion.
   建造船只时，为了推进安装了多个推进器轮。