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 Why Machines That Bend Are Better This 3D Printer Is an Artist That Paints With Light New Machine Turns Sheet Metal Into Custom Parts for Prototypes What Is The Best Security Bike Lock? Welding by Explosion Can Combine Any Metals Together Garbage Truck Crushing a Car