2 ms·
It seems the London Underground uses a four-rail system http://www.trainweb.org/tubeprune/tractioncurr.htm http://www.trainweb.org/tubeprune/tractioncurr.htm
by jffry 2y ago
It seems the London Underground uses a four-rail system http://www.trainweb.org/tubeprune/tractioncurr.htm http://www.trainweb.org/tubeprune/tractioncurr.htm