shifter
/ˈʃɪftə(r)/noun
usu. in combination
1- a person or thing that shifts something搬运工; 移动装置：
each morning the rock-shifters travel by donkey cart to start work.
每天早晨, 岩石搬运工乘驴车去上班。
1.1
- N. Amer. a gearbox of a motor vehicle or a set of gear levers on a bicycle〈北美〉（机动车的）变速箱; （自行车的）变速杆：
a new, improved five-speed shifter.
改进后的新五速变速杆。