POT-IN-POT COOLER, uses two clay pots, wet sand is placed between the pots, works without electricity, helps food and drink stay cool, uses evaporation, BICIBOMBA MÓVIL, uses a bicycle, a pump is attached to the frame, is driven by the back wheel, pumps water, can still be used as a normal bicycle, ALL-TERRAIN WHEELCHAIR, was designed for difficult terrain, can be manufactured at low cost, uses mountain-bike tyres, can use inflatable tyres, was designed to improve mobility

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