发明授权
US4625961A Transportable home energy training device and sprocket 失效
可移动家用能量训练装置和链轮

Transportable home energy training device and sprocket
摘要:
A transportable home energy training device having a supply drum with a tension element wound thereabout, the supply drum being rotatably coupled to a braking member, the braking member associated with a number of braking devices which may be selectively engaged against the braking member by a brake setting control, and a variable drive gear coupled to the brake setting control and an indicating wheel engageable by the variable drive gear for providing an indication of total work corresponding to the number of braking devices which are engaged against the braking member.
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