'Term for a moving stairway, it was originally a trademark of the Otis Elevator Co.'
Escalator
TECHNOLOGY: Term for a moving stairway, it was originally a trademark of the Otis Elevator Co.
Term for a moving stairway, it was originally a trademark of the Otis Elevator Co.
Term for a moving stairway, it was originally a trademark of the Otis Elevator Co.
TECHNOLOGY
Escalator
TECHNOLOGY