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Man operating a pulley with a lever and fulcrum.
UMG23A61_471

Man operating a pulley with a lever and fulcrum.

Men crushing and pressing olives in an olive press. Method of weighting the press. Great pressure realised by means of leverage ca. 1920
UMG22A09_157

Men crushing and pressing olives in an olive press...

Detail of a relief depicting gangs of slaves hauling and levering a colossal stone bull mounted on a sledge during the building of Sennacheribs palace at Nineveh
UMG12A16_218

Detail of a relief depicting gangs of slaves hauli...