scatola del cambio angolul

gearbox [gearboxes]▼(train of gears)
noun
[UK: ˈɡɪə.bɒks] [US: ˈɡɪr.ˌbɑːks]

box [boxes]▼((engineering) cylindrical casing)
noun
[UK: bɒks] [US: ˈbɑːks]