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2003³â 2¿ù Murata ³»¼ö ƯÆÇ
11¿ù Crystal, Oscillator, VCXO, TCXO Á¦Á¶
Century Crystal Electronics Çѱ¹ Áö»ç
2004³â 2¿ù Jiakang Electronics Çѱ¹ ƯÆÇ
2012³â 3¿ù ¢ß½Å±¤Æ÷Åä·¹ÀÌ ¹ýÀÎ Àüȯ
2015³â 10¿ù VMI, CalRamic Technologies Çѱ¹ ƯÆÇ
2015³â 11¿ù ȨÆäÀÌÁö °³¼³ (www.skphotora.co.kr)
¿Â¶óÀθÅÀå °³¼³ (www.skphotoray.com)
2017³â 1¿ù ȨÆäÀÌÁö ¸®´º¾ó (www.skphotoray.co.kr)