“After being forced to go in just two directions, up and down, for more than a century, escalators are finally getting a little freedom. A newly invented moving staircase will be able to twist, bend, spiral and even snake around sharp corners.”
“After being forced to go in just two directions, up and down, for more than a century, escalators are finally getting a little freedom. A newly invented moving staircase will be able to twist, bend, spiral and even snake around sharp corners.”