F03Level 2

MACHINES OR ENGINES FOR LIQUIDS

GET/api/v1/systems/patent_cpc/nodes/F03

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F03BMACHINES OR ENGINES FOR LIQUIDS

F03CPOSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS

F03DWIND MOTORS

F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS

F03HPRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR

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