0.8ร1ร1.2ร1.5ร1.7ร2ร2.5ร11 minโก๏ธ13 min11 min8 min 52 sec7 min 5 sec6 min 15 sec5 min 19 sec4 min 15 secIntroduction to Point Guard AVS0.8ร1ร1.2ร1.5ร1.7ร2ร2.5ร11 minโก๏ธ13 min11 min8 min 52 sec7 min 5 sec6 min 15 sec5 min 19 sec4 min 15 secIntroduction to Point Guard AVSYour user agent does not support the HTML5 Video element.