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There are some mind blowing machines made by the greatest minds of humanity, here is a compilation of some of my favorites. Website:
Mind Blowing Machines and Incredible inventions featured in this video: The Monocycle, A Train Snow-blower, Helicopter Tree Trimmer, A Massive Excavator, The Hemi Air Raid Horn, Brick Paving Machine, 28 Cylinder Aircraft Engine and a Tunnel Boring Machine.