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Petzl Croll
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Petzl Croll : ウィキペディア英語版
Petzl Croll

A Petzl Croll is an ascending device〔[http://www.petzl.com/en/outdoor/ascenders-0/croll Petzl Sport - Croll Chest Ascender〕 used in caving and industrial rope access made by the French company Petzl. Its name comes from the town Crolles where Petzl's company headquarters are located but might also be a reference to the nearby cave system of the Dent de Crolles, the exploration of which triggered a lot of technical effort leading to innovation in caving equipment.
==Usage==
The Croll is normally used in the chest position and in conjunction with an upper ascender or Jumar. This configuration allows a climber, caver or rope access worker to rapidly ascend a rope.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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