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دوستانه - صمیمانه - دوچرخه را چه کسی اختراع کرد ؟
 
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مدیر وبلاگ : رسول رستمی
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دوچرخه را چه کسی اختراع کرد ؟

نخستین  دوچرخه ی  قابل راندن وسیله ای به نام  رُرؤَک بود که در سال 1817 توسط بارُن « کارل وون درایس »  آلمانی اختراع شد . این وسیله پدالی برای رکاب زدن نداشت و کسی که سوار آن بود باید با چرخاندن دسته ی هِندل شکلی که به چرخ جلو متصل بود آن را می راند . در 1839  یک آهنگر اسکاتلندی به نام « کِرک پاتریک مک میلان » پدال را به آن افزود و در نتیجه اولین دوچرخه ی کامل ساخته شد . در 1870  مکانیکی فرانسوی به نام « پیِر لو منت » نخستین دوچرخه ی پدالی آمریکا را ساخت . همان سال شکل نوینی از دوچرخه به نام « چرخ بلند معمولی » یا « یک به چهار » به بازار آمد . این دوچرخه دارای یک چرخ بسیار بزرگ در جلو و چرخ کوچکی در عقب بود . در 1885  « جی . کی . استارلی » دوچرخه ساز انگلیسی نخستین دوچرخه ی موفق و ایمن تجاری را ساخت .                                                                                                                                         

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شنبه 6 شهریور 1389 :: نویسنده : رسول رستمی
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