/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: marawanmohey https://cdn.slidesharecdn.com/profile-photo-marawanmohey-48x48.jpg?cb=1523571108 Lecturer · Sep 25, 2010 to present damanhour univ