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The Wayback Machine - https://web.archive.org/web/20131104053951/http://www.ex.co.kr/portal/cor/organization/attraction/dunnae_bridge/dunnae.jsp

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???????? ??????? ??a???? ???θ??? ?????? ?????? ????? ??? 1,200m?? u?≫?. ??? ??????? ???? ?? ????? ??????. ?????? ????? ???? ??????? ???? ???? ??, ??? ??? ????????? ??? ????? ??뿴?????. ??κ??? ????????? ?츮???? ?????? ?? ???? ???? ???? ?????? ??? ???´?? ???? ????? ????????? ????? ??????. ????? ?г?????? ?????? ??????, ?????δ? u?≫??? ?????? ????1????? ??? 895m?? ??????? 832m???? ???? 60m???? ?? ???? ????? ?????? ????????. ?賭?? ????????? ?????? ???? ?????????? ??簡 ????? ?????? ?????θ? ???? ????, ???? ??? ????? ???? 1996?? 3???? ??????? 1999?? 12???? ??? ?????? 4???? ??????? ??????????.

???? ????, ????, ??÷?? ???? ????? ??????? ???? ?г?????? ????? ???????????.
????????? ??????? 895m?? ??? 710m?? ????? ???? ?????? ?? 2???? ????? ???? ?????? 3,300m ????? ?????, ????? ??? ???? ???? ??? ???ο? ???? 200m?? ??????? ???????? ????????? ?? ???? ???? 45m?? ?????? ?????????. ??ο? ????????? ????????? ???? ??ο? ???? ???? ???? ????? ???? ?????? ?? ????? ????? o??ο? a???u?(?????????u?)?? ???? ????? ??????????.

????????? ???? ?????? ???????? ???? ????? ???? ???????? ?????? ???????? ??? ?? ???y??? ????? ??o?? ?? ???, ???????? ?????? ????????? ?? ???? ??÷?? ????u??? ???? ??????????.

???? ???? ?? ?з?????? ??´? ???????? ????? ?ð??????ν? ?????????κ??? ????δ? 1km??, ????ð????δ? ?? 15???? ??????? ?????u??????? u?≫? ?????? ?????? ??????? ??? ???????? ?????????.

RBM 1�� Ȯ���� ��ġ��� RBM 1�� Ȯ�����Ǹ�� �� �Ա��� �ð� ���� ����

???, ??????ο? ????????? ????? ???????? ??????? ???? a?o? RBM(Raised Boring Machine)?????? ÷?? ???????? ???(RBM??)?? ?????? ???? 300mm?? ???????? ?????? ?? ???? 3.05m?? ??????, ???ĸ? ???? ???? 10m?? ????????? ?????? ?????? ?????? ????????.

????? ????? ?? ?? ???? ??????? ?????? ?????? ?????? ??????? ??????? ?? ???????? ??????? ?????? ???? ?????? RBM?? ??? ?????? ?쿩???? ?????? ?????? ?????? ????????? ??????? ?????. ????????翡?? o?????? a?o? ??? ?????? ?????????? ?ð????? ?????? ????????? ???? ??????? ?????? ????? ????? ??????? 4???? ???? ???? ????? ?? ????????. ????????? 1999?? 1???? ?????? ????? ???? ??þ???? ?? ?? ????? ????????? ???????, ??ð?????? ???? ????? ???? ??????? ???м?????? ????? ????????.

?? ???? ?? ???? u?≫??? ????? ?????? ???????? ???? ????? ?? ?? ?o? ?????? ????? ????? ???? ??? ??????? ???? ????? ????. ?г?????? ???? ?????? ?????? ???? ?????? ??밴???? ???? ???? ??????? ?ð????? ??? ???? ??? ???ij????? ????????? ?????е??? ??n? ???? ?帳???.

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