The rubber mattress consists of rubber layer, cloth-based silver paper (as a cover) and spring skeleton and is mainly used for motorcycle and bicycle in summer.
橡胶坐垫由橡胶层、布基型锡铂纸(面层)和弹簧骨架组成，适合于摩托车、自行车在夏季使用。
A bicycle frame is to a high-end bike what a skeleton is to a body, and it is also the most important part of bicycle design.
对于高端的运动自行车，车架相当于人体的骨架，是自行车设计最重要的部分。
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