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gearbox▼(train of gears)noun[UK: ˈɡɪə.bɒks] [US: ˈɡɪr.ˌbɑːks]
transmission [transmissions]▼(assembly of gears)noun[UK: trænz.ˈmɪʃ.n̩] [US: træn.ˈsmɪʃ.n̩]
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