/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: narasaiahn https://cdn.slidesharecdn.com/profile-photo-narasaiahn-48x48.jpg?cb=1587228437 - Dr.N.Narasaiah Associate Professor Dept. of Metallurgical & Materials Engineering National Institute of Technology Warangal - 506 004, India. Mobile: +91-8712793135, +91-9801341661 Phone: +91-870-246 2539(Off)