| http://www.w3.org/ns/prov#value | - Each is fitted with a tensioning device 15 that once tightened, keeps the ropes taught and the backpack assembly 1 secure prior to the descent, and the person secure during the descent. (Belts, bungees, buckles, straps, clips, tethers, rings, snaps, loops, ties, hook and loop material such as Velcro, and more may be used instead of the ropes and tensioning devices.)
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