减速器

例句：

1. 1. The car's engine is acomplex piece of machinery that includes several components, including the hydraulic accelerator and the gearbox.
   汽车的发动机是一个复杂的机械装置，包括液压加速器和齿轮箱等几个部分。
2. 2. The engineerused a special tool to adjust thespeed of the machine, which was crucialfor its operation.
   工程师使用特殊的工具调整机器的速度，这对于机器的运行至关重要。
3. 3.The reduction gearbox is designed to reducethe power output of the engine, allowingit to operate more efficiently.
   减速器设计用来降低发动机的输出功率，使其运行更加高效。