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Chuyen gen.swf
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Dinh luat 3 Niuton.swf
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He rong roc.swf
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Mang nghieng.swf
Mat Trang quay quanh Trai Dat.swf
May phat dien.flv
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Trai Dat quay - Ngay va dem.swf
ma KL thu cong.flv
su chuyen dong cua trai dat quanh mat troi.flv