/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: prasertnuda https://cdn.slidesharecdn.com/profile-photo-prasertnuda-48x48.jpg?cb=1523638834 ึϸµà¹ƒà¸ˆà¸ˆà¸±à¸‡à¸ˆà¸°à¸¡à¸µà¸«à¸¥à¸²à¸È¨¹�ล้ว