3 ms·
Related: Double-deck Elevators - http://en.wikipedia.org/wiki/Double-deck_elevator http://en.wikipedia.org/wiki/Double-deck_elevator - At what point do these be
by jisaacstone 15y ago
Related: Double-deck Elevators - http://en.wikipedia.org/wiki/Double-deck_elevator http://en.wikipedia.org/wiki/Double-deck_elevator - At what point do these become a worthwhile investment?