http://tw.youtube.com/watch?v=4hyv_H7EPzg
Full Version: Mini Chronograph
The mini precision chronoscope can measuring the firing range of guns.
http://tw.youtube.com/watch?v=4hyv_H7EPzg
http://tw.youtube.com/watch?v=4hyv_H7EPzg
you know there are much smaller chronos out there...
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