| 摘要 |
A speed reduction mechanism secured to a casing (1) has a motor (21) comprising pinions (22,24) engaged to respective gears (23,25) through chains (26,26). A transmission mechanism has connecting rods (31,31-35,35) that are pivotally and hingedly connected to a middle frame of the casing. a pair of foot pedals (36,36) and hand plates are pivotally and hingedly connected to open ends of respective connecting rods.
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