TDKUA comments, page 51

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21-December-2022 Wednesday
Reply to the post "The first successful flight in a helicopter in 1939: the invention of Igor Sikorsky"

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1939 Youtube Aviation Helicopter Inventions Reply to post Technics Success Falsification

09-August-2022 Tuesday
How a laptop works part 2

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Windows Electronics

04-August-2022 Thursday
Mega crab

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Big size Video Mining Crab Sea Marine life Primorsky Krai Arthropods

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