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Qualified Male Teacher Explaining Chemical Reaction To Pupils During Lesson At Modern School Children Of Elementary School Involving On Lab
Contributor: Vesna Ihor
4KMOV (mjpeg) - 474.3 MB
4KMP4 (h264) - 17.7 MB
HDMOV (mjpeg) - 104.4 MB
HDMP4 (h264) - 5.8 MB