WW-Winding Mechanism Water Pump
WW-Winding Mechanism Water Pump, only use your hand Pure structural water PUMP


Rotate 20 times, wind, and then release the handle, a spring driven pump turbine, centrifugal force is used to structure 
the pump, to pump the water out, one can take 20 liters of water.
so finish the 1 hectares of irrigation takes 1 hours, 10 sets of operation at the same time, equipment and material cost, aluminum alloy shell, the inner core is PC plastic, each cost about 100USD.
i will update the prototype soon.