gearshift

名词 gearshift:

1. a mechanical device for engaging and disengaging gears
   同义词：gearstick, shifter, gear lever

gear.shift

n.（名词）
A mechanism for changing from one gear to another in a transmission.
变速器，换档装置：在一传送过程中从一个齿轮变到另一个齿轮的一种机械装置