| 摘要 |
A backpack frame is especially designed, together with ancillary equipment, to make easier the transportation of a litter or other load carrier by two or more human bearers acting in concert. The backpack frame contains features which permit the attachment of a connecting device which may in turn be attached to the frame of a litter or load carrier. The connecting device is attached to the backpack frame by means of a system of cables connected to a hand-operated winch which is mounted on the frame and which permits upward or downward adjustment of the height at which the load is carried while the bearers are actually in motion.
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