流体機械 Hydroulic machinery 流体力学 Fluid dynamics, Hydrodynamics ヘロン Hero of Alexandria
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LS "Waterry Globe"

LS"The river stream controled loom"

Tinguely

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[Steve Hollinger] YoyTube

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ラス・メドゥラス Las Médulas 水力採鉱 Hydraulic mining