| 摘要 |
An exercising machine comprising an upright supporting structure, vertical tracks associated with the upright supporting structure, a carriage which slides vertically upwardly and downwardly on the vertical tracks, a lifting arm rigidly but removably connected to the carriage at any selected one of a plurality of vertically spaced connection points, and adjustable resistance means associated with the carriage to bias the carriage and lifting arm in a vertically downward direction downward movement of the carriage being limited by stop elements.
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