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reinforced PVC crossbow with laminated stock
How to Convert Water into Fuel by Building a DIY Oxyhydrogen Generator
Magnetic induction safety bike lights. Nearly invisible design, cheap, waterproof and battery free!
DIY PVC Speaker
Mechanical Monster Hands
Insulating curtains that cut heat losses through windows by 50%
DIY Solar Power Projects
Engineering a 2D Printed Logo into a 3D Object