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• n  a stairway whose steps move continuously on a circulating belt

• escalator
• moving staircase

News & Articles

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• Going up? For one station escalator, not anytime soon
  If you’re one of those health-nut commuters who eschew escalators to opt for stairs, no need to read further. Everyone else, listen up: There’s good news and bad news in the world of moving stairways.        
  Oct. 30, 2013 - Boston.com