คลื่นนิ่งใต้เส้นเชือก

posted on 15 Aug 2008 02:16 by physicsst59 in lesson

 

 

 

 

 

 

 

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edit @ 29 Aug 2008 16:03:32 by Physics Project Team

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ดีๆ

#1 By (58.9.122.191) on 2010-07-18 17:04