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F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F03B—MACHINES OR ENGINES FOR LIQUIDS
F03B17/00—Other machines or engines
F03B17/005—Installations wherein the liquid circulates in a closed loop ; Alleged perpetua mobilia of this or similar kind
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FR569864D1923-05-261923-05-26Procédé pour obtention de force hydraulique
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