| 摘要 |
The device is a backrest for a bicycle that consists of three main parts. The backrest: a padded rectangular shaped device that attaches horizontally to a thick walled vertical post, that transverses downward at a 55° angle and is coupled with a thick walled cylindrical mounting bracket. The mounting bracket has a cylinder that accepts the seatpost of a bicycle, attaching the whole assembly to the frame. |
