3 Rappel/abseil stations should be installed where descending by foot is likely to cause erosion problems.
3 Rappel/abseil stations should be installed where descending by foot is likely to cause erosion problems.
3下降点的设置处，应选在以步行方式下降会产生侵蚀问题的地点。
3 Rappel/abseil stations should be installed where descending by foot is likely to cause erosion problems.
3下降点的设置处，应选在以步行方式下降会产生侵蚀问题的地点。