У вашего броузера проблема в совместимости с HTML5
This is a video review of the hy-div2689 tb6600 stepper driver.
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See my other cnc and 3d-printer related videos here.
http://www.youtube.com/playlist?list=PLT0IPUIWKw2G8Wdb6c291t_hPqyaEXCFq