WHAT DOES LINE电脑版下�?MEAN?

Trams draw their electric power from a single overhead wire at about 500 to 750 V DC. Trolleybuses draw from two overhead wires at an analogous voltage, and at the very least among the list of trolleybus wires must be insulated from tram wires. This is normally finished from the trolleybus wires working repeatedly in the crossing, with the tram co