| 摘要 |
<p>A plurality of sprockets (F1 to F14) are coaxially mounted together, wherein a spacing between each pair of adjacent sprockets is less than a thickness of at least one of the plurality of sprockets (F1 to F14). In another embodiment of the invention, a plurality of sprockets (F1 to F14) are coaxially mounted together, wherein a spacing between each pair of adjacent sprockets is less than or equal to approximately 2.0 millimeters. In yet a further embodiment of the present invention, at least ten sprockets are coaxially mounted together to form a first free side sprocket surface (144) facing laterally outwardly and a second free side sprocket surface (140) facing laterally inwardly. A spacing between the first free side sprocket surface (144) and the second free side sprocket surface (140) is less than or equal to approximately 50 millimeters. <IMAGE></p> |
