Youtube 網站上有關垂直下降練習的連結

Rappel 坐式下降法, 繞繩下降

   0. How to Tie a Rappel

     http://www.youtube.com/watch?v=TZ7rn_LMWI8

      0. Swiss Seat

    http://www.youtube.com/watch?v=ssmYruwGTzM

     0. How to Make a Rope Harness

      http://www.youtube.com/watch?v=QOvKL4nZqpY

    1.  How to Rappel

          http://www.youtube.com/watch?v=iYTSAuHOHiY