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Buses are usually powered by [[diesel engine]]s but electric buses are also used. An electric bus may be powered by an on-board battery or by overhead wires. In the latter case, the vehicle is known as a trolleybus.
Buses are usually powered by [[diesel engine]]s but electric buses are also used. An electric bus may be powered by an on-board battery or by overhead wires. In the latter case, the vehicle is known as a trolleybus.
==External links==
* [https://commons.wikimedia.org/wiki/File:Trolleybus_Low_Floor_4_1500_-_Sao_Paulo,_Brazil.JPG A trolleybus in Sao Paulo, Brazil]
==See also==
==See also==