spur gear pair

例句：

1. 1.The team's performance was greatly improved by the new spur gear pair.
   团队的表现通过新的推进器对得到了很大的提高。
2. 2.The engineer designed a new spur gear pair to enhance the efficiency of the machine.
   工程师设计了一种新的推进器对，以提高机器的效率。
3. 3. The race car used a special spur gear pair to accelerate quickly.
   赛车使用了一种特殊的推进器对来快速加速。