| 摘要 |
A bicycle frame includes a front frame having a bottom bracket secured to the bottom portion. A middle frame is pivotally coupled to the bottom bracket and is rotatable relative to the front frame. A chain stay has one end pivotally coupled to the bottom bracket and has the other end coupled to the middle frame by a shock absorbing device. Another shock absorbing device is secured between the front frame and the middle frame so as to allow relative movement-between the middle frame and the front frame and so as to absorb shocks transmitted between the middle frame and the front frame.
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