전기에 대해서 공부해야 하는 페이지에 대해서 저장한다.
https://blog.naver.com/chadolk25/220147455447
https://blog.naver.com/ds4dxs/220028728262
https://cafe.naver.com/gagarinaircon/54736
https://cafe.naver.com/power119/74235
https://www.google.com/search?q=%EC%A0%84%EB%A0%A5%ED%91%9C%EC%8B%9C%EA%B8%B0+%EC%A0%84%EB%A0%A5%EB%9F%89%EA%B3%84&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi38NeV_5bgAhXGErwKHZzUA-8Q_AUIDigB&biw=1920&bih=969#imgrc=chqJ80PHJ1GefM:
file:///C:/Users/User/Downloads/%EA%B3%84%EB%9F%89%EA%B8%B0%EC%A2%85%ED%95%A9_K_170324.pdf
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