4 Rappel/abseil stations should be installed where a tree is used for the anchor or where other features used may be unsafe (e.g. old fixed sling or unsafe natural \bollard\).
4 Rappel/abseil stations should be installed where a tree is used for the anchor or where other features used may be unsafe (e.g. old fixed sling or unsafe natural \bollard\).
4下降站的设置处，应在只能借树木或不可靠的物体(如老旧的固定扁带或不安全的天然柱体)设固定点的地方。