This is How Mail Was Processed Back in 1970 Not sure why I was able to watch this whole video, I don’t feel any smarter or any better…but I loved it. Facebook Prev Article Next Article Machinery Checkout these cool gadgets... Related Posts This One-of-a-Kind Machine has 588 Metallic Teeth Reinventing The Conveyer Belt 3D Cold Spray Repairs Any Metal Component to Its Former Glory Welding by Friction is Amazing High-speed Steady Flight in Confined Spaces for Tethered Quadrocopters The Most Clever Lock You Will See