| 摘要 |
The improved bicycle consists of a second large chain sprocket-pedal system whose initial means of propulsion are achieved. The additional pedals 7 are mounted in mechanical slides or guides (straight trajectory). The initial spindle 2 carries the large sprocket 3 and two additional large sprockets 4, one on the right hand side, one on the left hand side of the frame of the bicycle. A second spindle 5 is fixed to the frame, which spindle carries two other large sprockets one to the right and one to the left of the frame. The two sprockets of the spindle 2 and 5 are connected with chains 6 to which the pedals 1 are fixed. <IMAGE>
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