| 摘要 |
A worm gear mechanism driven by an electric motor and operatively coupled to a reel having a length of high tensile line for an emergency escape from a high structure. The reel is arranged within a casing, and a belt is connected to the casing for supporting a person's body. The worm gear mechanism rotates the reel, feeding out the line, and thereby lowering the user to a safe location below.
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