Moderator: Tim White
In 1968, Bruno Dressler presented three products to him: ancestors of the chute (system of fixed flask pulleys) and of the blocker-on-cord (ascenders?). He took these as a starting point for the process, reverse engineered them, and then developed the new finished products. These, the first tools of the revolution in the techniques of descent and ascent on rope, are ready. The speleologist discovered his autonomy, and the new prospects for exploration that the new tools offered.
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