History, asked by novjotsingh521998, 5 months ago

explain these line wires above and track below

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An overhead line or overhead wire is used to transmit electrical energy to electric trains, ... An overhead line consists of one or more wires (or rails, particularly in ... a catenary curve, thus the use of "catenary" to describe this wire or sometimes the ... As the pantograph moves along under the contact wire, the carbon insert on ...

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