gears 75 gear drives 41 cars 23 belt drives 21 gear wheel 15 gearboxes 15 chain drives 15 more ... simulation and modelling 14 machine parts and joints 13 belts 13 classical mechanics 11 mechanisms 11 machine drives 10 car gearboxes 9 epicyclic drives 9 internal combustion motors 9 servomechanisms 8 hydrostatic gears 7 simple machines 7 continuously varying speed gears 7 mechanical engineering 7 hybrid drive vehicles 7 oscillations (physics) 6 machines 6 car motors 5 pipe hydraulics 5 mills 5 pumps 5 electric cars 4 construction 4 less ...