Mechanisms
Screws · Brakes
Keys · Pipes
Rivets · Valves
Bearings · Springs
Pins, axles, shafts · Cranks and rods
Couplings · Cams
Ropes, belts, and chains · Pulleys
Friction wheels · Engaging gears
Toothed wheels
Flywheels
Levers and connecting rods
Click wheels and gears
Ratchets
daVinci
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