Propose:Invention, Structure, Design

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Propose:Business, Economy, Policy -- Propose:Invention, Structure, Design

Inexpensive Liquid Nitrogen Generator
Propose:Invention, Structure, Design:Inexpensive Liquid Nitrogen Generator Created on Thu Aug 19 17:56:16 2004 by charmed_quark

Dynamic Speed Limit System
Propose:Invention, Structure, Design:Dynamic Speed Limit System Created on Thu Dec 9 8:19:19 2004 by Truc_Ha

Closed System GunPowder Engine
Propose:Invention, Structure, Design:Closed System Gunpowder Engine Created on Mon Oct 1 10:55:19 2007 by TheLiberal