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Continue to ChatIntroducing The Pythagoras Sling - a new space launch concept https://timeguide.wordpress.com/2017/09/01/introducing-the-pythagoras-sling-a-new-space-launch-concept/
Introducing The Pythagoras Sling - a new space launch concept https://timeguide.wordpress.com/2017/09/01/introducing-the-pythagoras-sling-a-new-space-launch-concept/