| 摘要 |
An apparatus wherein an elongate, flexible rope member includes a first handle mounted thereto, with a transparent sleeve overlying the rope member and mounted within a lock ring. The lock ring includes a threaded cavity to threadedly receive and compress a split, conical forward end of an oaque tube. The opaque tube includes a spring member mounted through the opaque and transparent tube and secured to the flexible rope member, whereupon release of the opaque tube by the flexible ring permits extension or contraction of the rope member within the transparent tube.
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