• besmarter (40)in #steemstem • 8 years ago

  How do airplanes fly?

  Boening 747 with a common name "Jumbo yet" is the one of the most biggest jet planes in the world. He has very…

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   11 3
• besmarter (40)in #s • 8 years ago

  Hello steemit! Some words about me/kilka słów o mnie

  A short introduction.../Krótki wstęp...   Hello steemit! I'm Marcin and it's quite pleased that I can join to Your…

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   20 22