Horses and carriages began to appear before 1 and 3000 years ago, and were the main means of transportation in China from 3000 years ago to the end of Qing Dynasty. 2. Bicycles, and the first "Trojan Wheel" car was built in 179 1 year. This car has two wooden wheels, a beam in the middle and a bench on it, like a toy. Because the car has no transmission chain, the car can move slowly by pedaling hard with the rider's foot. Moreover, there is no steering device on the car, so you can only go straight without turning. After going out for a while, you will be very tired and sweaty. It was also in 1888 that John K. stahly of Coventry, England, made the first modern bicycle-the "safety" bicycle. Its main feature is the diamond frame, which makes the car body have higher stiffness and strength. The rear wheel is driven by a chain and the direction is directly controlled by the front fork. 3. Train 18 14, finally invented a locomotive. This kind of steam engine is called a train because it keeps emitting fire from the chimney as it moves forward. 1825 The world's first passenger and freight steam locomotive was successfully trial-produced. On September 27th this year, the locomotive held a trial operation ceremony. Dragging 12 truck and 7 buses, carrying 90 tons of goods and 450 passengers, driving at a speed of more than 20 kilometers per hour 12 miles. 1929, Stephenson built a more perfect train. At this point, the train has finally been recognized by the whole world. 4. Maglev train: As early as 1922, German engineer Herman Qiangsuo put forward the principle of electromagnetic levitation, and applied for the patent of maglev train in 1934. The Japanese began to study the constant guidance maglev railway on 1962. Since then, due to the rapid development of superconducting technology, the superconducting maglev railway has been studied since the early 1970s. In 1972, the experiment of a 2.2-ton superconducting maglev train was successfully carried out for the first time, with a speed of 50 kilometers. 1977 65438+February on the Miyazaki maglev railway test line, the top speed reached 204 kilometers,1979 65438+February further increased to 5 17 kilometers. 5. Plane, 1903 The first plane came out.
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