Author: video: lauyunxi, model: lookang
Contact: weelookang@gmail.com
More information at: http://weelookang.blogspot.com/2014/08/tracker-ball-free-fall-in-viscous.html
Tracker Experiment
Author: video: lauyunxi, model: lookang
Contact: weelookang@gmail.com
More information at: http://weelookang.blogspot.com/2014/08/tracker-ball-free-fall-in-viscous.html