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.//

1 year ago

Health & Science 24x7 physics futuredoctor neet blackhole astrophysics quantum quantumphysics cbse cosmology

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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