discovery of vehicles
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IN the the 18 th century.......
With the help of a wheel like structure used on bullock carts then by time to time it has developed into cars, trains, buses, etc and techniques developed air vehicles also like helicopter, aeroplane, chopper!
With the help of a wheel like structure used on bullock carts then by time to time it has developed into cars, trains, buses, etc and techniques developed air vehicles also like helicopter, aeroplane, chopper!
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