I liked the part where he makes sounds shhhhshshhhhhshhhs to denote the working of whisk broom scanners. Thanks for explaining in a simple manner.

GOOD CLASS. my master studies says thank you and me as will.

Simplest explanation. Awesome...😍

Very clear ! Thank you from Rome

Thank you for the great explanation.

explained simply n nicely

Thank you very much!!

Thank you

Thx

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