gearbox

名词 gearbox:

1. the shell (metal casing) in which a train of gears is sealed
   同义词：gear case

1. Can the engine and the gearbox be supplied separately?
   发动机和变速箱能分开供应吗?

gear.box

n.（名词）
See transmission
参见 transmission
A protective casing for a system of gears.
齿轮箱：一种保护性的箱子，用来存放一套齿轮