---------------[¼Ö·ç¼Ç] ÀüÀÚȸ·Î Å丶½ºÀú 7ÆÇ ¼Ö·ç¼Ç
-----------------ÀüÀÚȸ·Î 9ÆÇ ¼Ö·ç¼Ç(electronic devices and circuit theory)
http://soho112.com/board_view.php?board=board676407&num=2906&tnum=203&page=1&sear=&search=&left_menu=