/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: BillSin1 https://cdn.slidesharecdn.com/profile-photo-BillSin1-48x48.jpg?cb=1523155049 ²»Òª†– ºÜ¿Ö²À