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Combustion Engine
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Jack Imakr
76,884
Spinning Balancing Bird
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Mark Ledwold
40,369
Geared Heart, Hand Crank Edition
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Greg Zumwalt
51,198
Support free strong Bolt
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Jack Imakr
45,245
Perpetual Motion, da Vinci Style
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Greg Zumwalt
42,247
Newton's Cradle
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Corey Schwenke
35,992
Poppy Humanoid
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Poppy Project
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Screw
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Kirby Downey
34,733
The Impossible Bearing 2.0
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Lloyd Bolts
41,094
LZ-129 Hindenburg - scale 1/1000
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vandragon_de
14,769
Hubble Space Telescope
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NASA
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Saturn V Rocket
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NASA
48,473
Nautilus Gears
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Misha Tikh
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