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Something akin to bellows pumps ( like nineteenth century organs) operated by the feet, or maybe semi-automatic hydraulic pumps operated by river current or gravity, as few if any intact speciments survive, conjecture is at full flood!

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14y ago
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14y ago

hydralic pump

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Anonymous

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3y ago

hydraulic pump

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Q: What is The constant air pressure needed to play the hydraulis was supplied by a .?
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