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Smart cylinder is a cylinder which has a small hole at center of it for the plant . it can store water ,which was taken by saving rain water and also water that the gardener put into it, to transfer that to the plant. when the scylinder get full and heavy during raining or ...,it start close its top to keep the water from evaporation. after saving water it start irrigate and transfer water from the holes on the body easily to the soil .after a few days when the scyliner lose most of its water and also weight it, it start opening .it could be a sign for the gardener in order to understand that which plant need water and which plant have water
seyyed amir arsalan shams abadi,