واٹر مل تجربہ
Gelsonlab HSTM-073 تعلیم سائنس کھلونے واٹر مل تجربہ
واٹر مل تجربہ 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.