Bicycles, ice bicycles, five-wheeled bicycles, bicycles have gradually become popular means of transportation. Later, with the emergence of pneumatic tire chains, the structure of bicycles became more and more perfect. The inventor of bicycles, Lao Rice, also invented meat grinders, and typewriters[
1877198suoq
Bicycles, ice bicycles, five-wheeled bicycles, bicycles have gradually become popular means of transportation. Later, with the emergence of pneumatic tire chains, the structure of bicycles became more and more perfect. The inventor of bicycles, Lao Rice, also invented meat grinders, and typewriters[
听友77015527
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1877198suoq
自行车,水上脚踏车,冰上自行车,五轮自行车,自行车逐渐成为大众化的交通工具,以后随着充气轮胎,链条等出现,自行车的结构越来越完善。自行车的发明者老莱斯还发明过绞肉机,打字机都能够减轻劳动强度,现在铁路工人在铁轨上利用人力推进的小车也是德莱斯发明的。所以称它为德莱斯11
1877198suoq
奇妙,现在自行车像潮水一样遍及世界各地,进入家家户户,但很少有人知道发明自行车的是德国的一个人,他的名字叫德莱斯,德莱斯原来是一位看林人,每天都要从一片林子走到另一片林子。多年走路的辛苦激起了他想发明一种交通工具的欲望,他想如果人能坐在轮子上,那不就走得更快了吗?就这样,德莱斯开始设计和制造自行车。他用两个木轮,一个安座以及一个安在前轮上起控制作用的车把制成了一辆轮车,人坐在车上用双脚蹬地驱动木轮运动,就这样,世界上第一辆自行车德莱斯第一次骑自行车旅游,一路上德莱斯第一次骑自行车旅游,一路上受尽人们的绩效,他决心用事实来回答这种绩效,一次比赛当中,他骑车四小时通过的距离,马拉车却用了15个小时
听友190490265
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