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History
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Wooden screw in ancient Roman olive press
Wooden screw in ancient Roman olive press
A screw jack. When a bar is inserted in the holes at top and turned it can raise a load
A screw jack. When a bar is inserted in the holes at top and turned it can raise a load
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The screw's self-locking property is the reason for its wide use in threaded fasteners like bolts and wood screws
The screw's self-locking property is the reason for its wide use in threaded fasteners like bolts and wood screws
Illustration of a four-bar linkage from Kinematics of Machinery, 1876
Illustration of a four-bar linkage from Kinematics of Machinery, 1876