Fast-roping, also known as Fast Rope Insertion Extraction System (FRIES),MCRP 3-11.4A Helicopter Rope Suspension Techniques (HRST) Operations is a technique for descending a thick rope.
双语例句
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That's what happened to Sean Halsted one day when he fell 40 feet to the ground while fast-roping from a helicopter during a training mission at Hurlburt Field, Fla.