Locomotive
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A Locomotive is a machine used to haul a train. In the 19th century, locomotives were powered by steam. During the 20th century, there was a transition from steam to electric and diesel power.[1]
Diesel locomotives
Major manufacturers of diesel locomotives in the United States include Electro-Motive Diesel and General Electric.
Steam locomotives
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Steam locomotive
In the 21st century, steam locomotives are rarely used in commercial service but preserved examples can still be seen on heritage railways.