पानी मिल प्रयोग
Gelsonlab HSTM-073 शिक्षा विज्ञान खिलौने पानी मिल प्रयोग
पानी मिल प्रयोग is mainly composed of pendulum handle, water wheel, wheel axle and mortar pestle. The water wheel is a device that converts the potential energy of water flow and drop into mechanical energy.