งานบนเว็บ

http://www.mediafire.com/view/232ghsjzant8v66/%E0%B9%80%E0%B8%99%E0%B8%B7%E0%B9%89%E0%B8%AD%E0%B9%80%E0%B8%9E%E0%B8%A5%E0%B8%87%E0%B8%AA%E0%B8%B2%E0%B8%81%E0%B8%A5%E0%B8%A0%E0%B8%B2%E0%B8%84%E0%B9%80%E0%B8%A3%E0%B8%B5%E0%B8%A2%E0%B8%99%E0%B8%97%E0%B8%B5%E0%B9%88_1-2556.pptx