Singapore Inventors' Development Association (SIDA) 新加坡发明协会
The battery that charge itself by walking
Meeting Tweeter log for SIDA meeting on 29 Dec 2012
Jan 08
http://prezi.com/8d9zhu-hiaqj/sida-2012-review/?auth_key=538bab25f660d39389fded658acb1b2c63adb1b6&kw=view-8d9zhu-hiaqj&rc=ref-16588287
