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http://www.instructables.com/id/3D-Printed-Speaker-Enclosures-With-Lights/
http://blog.stratasys.com/ko/2013/04/09/led-%EB%9D%BC%EC%9D%B4%ED%8A%B8%EC%87%BC%EB%A5%BC-%EC%97%B0%EC%B6%9C%ED%95%98%EB%8A%94-3d-%EC%9D%B8%EC%87%84-%EC%8A%A4%ED%94%BC%EC%BB%A4/
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