Name: how does an escalator work?
Uploaded: 2023-12-04T14:57:33+00:00
Duration: 4 min 46 s
Description: welcome to my channal like , share and subscribe to know more about some scientific fact and knowledge. it help you to grow up your knowledge. support us it help me to make new video for you.//

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welcome to my channal like , share and subscribe to know more about some scientific fact and knowledge. it help you to grow up your knowledge. support us it help me to make new video for you.//

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