The Escalators An American, Charles D. Seeberger, invented moving stai dịch – The Escalators An American, Charles D. Seeberger, invented moving stai Việt làm thế nào để nói

The Escalators
An American, Charles D. Seeberger, invented moving stairs to transport people in the 1890s. He called this invention an ‘escalator’, taking the name from the Latin word ‘scala’. Which means ‘ladder’. Escalators move people up and down short distances. Lifts do the same, but only move a small number of people. If an escalator breaks down, it can still be used as ordinary stairs. An escalator can move between 8,000 and 9,600 people an hour, and it does not need a person to operate it.
Towards the end of the nineteenth century, cities were becoming more crowded and the first escalators were built at railway stations and in big department stores, so that people could move about more quickly. Today we see escalators everywhere.