WHAT DOES LINE电脑版下�?MEAN?

Trams attract their ability from just one overhead wire at about 500 to 750 V DC. Trolleybuses attract from two overhead wires at an identical voltage, and not less than one of several trolleybus wires should be insulated from tram wires. This will likely be completed via the trolleybus wires managing continuously from the crossing, Using the tram