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Here is a collection of retrieval methods, some including carabiners. Perhaps looking through here will job your memory. http://dyeclan.com/outdoors101/canyoneering101/?page=rigging-a-retrievable-...
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Here is a collection of retrieval methods, some including carabiners. Perhaps looking through here will job your memory. http://dyeclan.com/outdoors101/canyoneering101/?page=rigging-a-retrievable-...