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�ݺ�ߣshows by User: thepkong / http://www.slideshare.net/images/logo.gif �ݺ�ߣshows by User: thepkong / �ݺ�ߣShare feed for �ݺ�ߣshows by User: thepkong https://cdn.slidesharecdn.com/profile-photo-thepkong-48x48.jpg?cb=1523564511 โรงเรียนพิจิตรพิทยาคม 2536