Whereby the mechanism designed to improve energy efficiency, is also desirable sports equipment or human driving device generated when the mechanical work into electrical energy
The mechanism is designed to improve energy efficiency and also hopes that the mechanical work generated by sports equipment or equipment when driven by human sand will be converted into electrical energy.
The mechanism is designed to improve energy efficiency, and it is also hoped that the mechanical work generated by sports equipment or equipment when driven by human power will be converted into electrical energy<br>