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  • bitdays.co.kr/2021/07/22/%25EC%2584%25B8%25EA%25B3%2584-hvdc-%25EC%25A0%2584%25EC%2586%25A1-%25EC%258B%259C%25EC%258A%25A4%25ED%2585%259C-%25EC%258B%259C%25EC%259E%25A5-%25EB%25B3%25B4%25EA%25B3%25A0%25EC%2584%259C-%25EC%2584%25A4%25EB%25AC%25B8-%25EC%25A1%25B0%25EC%2582%25AC-2021-2025-%25EC%2597%2585%25EA%25B3%2584-%25EB%258F%2599/ (port 80)