Dipl.-Ing. Joachim Hecker -
Journalist & Autor
Frankfurter Straße 12
D-58095 Hagen/ Westf.
Fon 0 23 31/ 9 23 00 56
eMail kontakt@joachim-hecker.de
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Joachim Hecker
„Tested: Forgot your glasses? No problem! – More depth of field through small holes“ (2)
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- Category: Impressionen
„Tested: Air pressure experiments – Tumblers, Suction Cups and Unicorns“ (2)
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- Category: Impressionen
„Tested: Balance! – Balancing has to be learned“ (2)
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- Category: Impressionen