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gear wheel▼(wheel with a toothed rim)noun[UK: ɡɪə(r) ˈwiːl̩] [US: ˈɡɪr ˈhwiːl̩]
pinion [pinions]▼(gear in a gear drive train)noun[UK: ˈpɪ.nɪən] [US: ˈpɪ.njən]
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