moving stairs metal handrails on both sides of the stairs landing platform at the top and bottom control panel with buttons for start and stop metal steps in between the handrails a motor to move the stairs safety sensors and alarms
escalator which has moving stairs escalator which has metal handrails on both sides of the stairs escalator which has landing platform at the top and bottom escalator which has control panel with buttons for start and stop escalator which has metal steps in between the handrails escalator which is a motor to move the stairs escalator which has safety sensors and alarms