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Tec 77
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Perpetuum
Tec 77-The Spin
Das (erste echte?) Perpetuum Mobile erfunden von David "Daedalus" Jones im Detail
OBSIDIAN gibts WIRKLICH! Minecraft in Real Life 3 - Techtastisch #86
5 Amazing Inventions You Didn't Know Existed #77
13 year old Invents Free Energy Device for 14 bucks!
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Tec 77
Paghahanap: Tec 77
