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2008³â µ¿¾Æ½Ã¾Æ ±¹Á¦ Á¶¸í ÄÁÆÛ·±½º ³í¹® ¼ö·Ï 2008-07-22  
2008³â Áß±¹ µ¿¾Æ½Ã¾Æ ±¹Á¦ Á¶¸í ÄÁÆÛ·±½º¿¡ "Improved Road light Design using Ray-tracing method" ³í¹®À» Á¦°³ ÇÏ¿´½À´Ï´Ù