/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: Polashju https://cdn.slidesharecdn.com/profile-photo-Polashju-48x48.jpg?cb=1523452412 Polash Ahmed http://techbook24.blogspot.com http://szone24.blogspot.com http://new24pic.blogspot.com/ E-mail: polash.ju@gmail.com Jahangirnagar university B.Sc. (hons.) 4th Year