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並前往https://www.petzl.com/US/en/Professional/Movement-and-work-in-the-tree-using-DdRT-and-SRT-with-the-ZIGZAG?ActivityName=Tree-care

Movement and work in the tree using DdRT and SRT - Petzl

The ZIGZAG may be used on doubled rope (DdRT) and on single rope (SRT) when combined with the CHICANE. Each technique has advantages and disadvantages depending ...

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