ขนาดวิดีโอ: 1280 X 720853 X 480640 X 360
แสดงแผงควบคุมโปรแกรมเล่น
เล่นอัตโนมัติ
เล่นใหม่
Thank you for posting this. In 4 days, it will be 30 years since this conference took place.
Thank you for posting this. In 4 days, it will be 30 years since this conference took place.