additional corrector pinion

例句：

1. 1. The additional gear in the transmission helps to smooth out the shifting.
   传动系统中的附加齿轮有助于平滑换挡。
2. 2. The auxiliary gear was designed to assist the main gear during heavy loads.
   辅助齿轮设计用于在重载时协助主齿轮工作。
3. 3. The new design incorporates additional gears for improved efficiency and reduced wear.
   新设计增加了额外的齿轮，以提高效率并减少磨损。