Example image of eyePlorer eyePlorer map for 'Gear': Rotation Transmission (mechanics) Pulley Speed Torque Rack and pinion Mechanical advantage Continuously variable transmission Book of Song China Differential (mechanical device) Hero of Alexandria South Pointing Chariot Zhou Dynasty Unicode Gear ratio Involute gear Belt (mechanical) Traction (engineering) Automobile Helix Gear shaper Escapement Spiral bevel gear Hyperboloid Screw Machine head Steering Rack railway Epicyclic gearing List of gear nomenclature Backlash (engineering) Derailleur gears Hub gear Roller chain Sprocket Air pollution Roadway noise Sound Noise barrier Friction Cycloid gear Undercut (manufacturing) Automobile interior equipment AW additive Axle Bevel gear China High Speed Transmission Data Transport Utility David Brown Ltd.