http://www.phiko.kr/bbs/board.php?bo_table=z11_03&wr_id=1257&sca=20%25ED%2598%25B8_%25EC%25A0%259C%25EC%25A3%25BC-%25ED%2599%2594%25EB%25AF%25B8%25EA%25B1%25B4%25EC%25B6%2595
실내 전기 배관배선 및 기타 기계설비 작업