社会在飞速的发展,科学技术在迅猛地进步,消费者的生理和心理更是要求市场经常更新品种.应当说,自行车与我们的生活有着极其密切的联系.从社会的意义来说,它不仅是我们代步的最简便的工具,也是一种娱乐与体育并存的完美手段,同时又是一具不需要燃料、不产生污染的动力机.在我国,自行车早已成为人们主要的交通工具之一.今后,随着科学技术的发展和人们生活水平的提高,自行车普及和应用的范围还会不断扩大:尤其在当代城市中棘手的交通、污染公害等矛盾面前,自行车更体 The rapid development of society, science and technology are rapidly progressing, the consumer’s physical and psychological requirements of the market is constantly updated varieties.It should be said that the bicycle has a very close relationship with our life.From the social sense, it not only Is the easiest way for us to travel, but also a perfect means of entertainment and sports coexistence, but also a fuel-free, non-polluting power machine in our country, bicycles have long been one of the main means of transport in the future , With the development of science and technology and the improvement of people’s living standard, the scope of popularization and application of bicycles will also continue to expand: especially in the contemporary cities in the face of such troublesome traffic, pollution and other contradictions,