2021 年 10 月 9 日 – 書劍戶外學習中心

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雙張力系統及無張力後備系統比較－Test comparison between Two Tensioned Rope Rescue System and Dedicated Mainline with Un-Tensioned Belay (back-up) Rope Rescue Systems.

9 10 月, 2021 /

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使用未受力的後備系統比較好嗎？ Two Tensioned Rope Res […]

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