Bicycles are transported by human energy. Powered by the ball stairs. Vehicles for backcountry routes There are two wheels connected to Fred.
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- 大图:4803 × 3202 像素·40.67 cm × 27.11 cm·300dpi·JPG
- 中图:1000 × 667 像素·35.28 cm × 23.53 cm·72dpi·JPG
- 小图:500 × 334 像素·17.64 cm × 11.78 cm·72dpi·JPG