| 摘要 |
<p>This invention concerns a device for generating an adjustable an resisting force for body building machines, characterised by a lever pivoted by means of horizontal pins to the supporting structure of the machine, the same being fitted with a sliding and arrestable mass along the lever, one of whose ends is fitted with attachments for the mechanical devices used to transmit the muscular force that the athlete transmits on the handles or the foot board of the machine, to the lever. <IMAGE></p> |
