/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: engchieh https://cdn.slidesharecdn.com/profile-photo-engchieh-48x48.jpg?cb=1523452556 Ç°£¨Ç®£©Í¾Ã£Ã£¡£¡£¡£¡£¡£¡£