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524

Centuries: 5th century - 6th century - 7th century

Decades: 470s - 480s - 490s - 500s - 510s - 520s - 530s - 540s - 550s - 560s - 570s

Years: 519 520 521 522 523 524 525 526 527 528 529


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Pump

... process similar to peristalsis in animals) Circumferential piston pump[?] progressive cavity pump : pumps fluid by the rotation of a helical steel rotor inside a rubber ...