who invented bicycle

The German Baron Karl Drais von Sauerbronn invented the "Laufmaschine" or "Running Machine",a type of pre-bicycle,which was first exhibited in Paris on April 6,1818.
Ernest Michaux,the French father and son team of carriage-makers,invented the modern bicycle pedal and cranks in 1861.
也就是说,德国人Baron Karl Drais von Sauerbronn造出了自行车的雏形,并于1818年第一次在巴黎展出.法国人Ernest Michaux于1861年发明了近代的自行车脚蹬.两个都是自行车历史上很重要的阶段.