Why Do Escalators Have Those Vertical Grooves?
May 22, 2019 15:14
Millions of people around the world use escalators daily. But have you ever wondered how exactly it works?
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In fact, this device consists of two chains moving at an inclined angle and two pairs of wheels on each step. The whole construction is driven by an electric motor. Similar to a conveyor belt, an escalator is a kind of conveyor made of steps.