Демонстрация солнечной энергии
Gelsonlab HSPEN-016 Демонстрация солнечной энергии , Solar Power demonstration for teaching use ,Solar Powered Appliance Material
This education Демонстрация солнечной энергии model can demo the solar powered electricity used for different ways,can make Miniature motor working, light emitting diode, make Buzzer buzzing...it's a very good demonstration for educational.