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Top 100 Sites for Free 3D Models and CAD Block Libraries
of free and paid 3D models and STL files that will work with the most popular CAD software and 3D printers. We’ve gathered a list of 100 best sites for free 3D models containing file types: .blend, .fbx
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Top 50+ Sites for 3D Modeling Challenges, CAD Engineering Competitions & Contests
MyMiniFactory is a massive gallery of downloadable 3D models that are guaranteed usable for successful 3D printing. Apart from giving you access to their collection, they constantly host design competitions for
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Top 100 Gadgets That Changed the World
for the first time in 1970. It had several circuits to add, multiply, subtract, and divide before printing the calculated result on a piece of thermal paper. Thirteen battery cells powered the calculator