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 These are the Mecanum wheels. They don’t require steering to turn the vehicle. Useless Perpetual Devices Watch How a Pack Planter Robot Transplant Pansies A Roller Coaster You Power With Your Feet – Sky Cycle at Washuzan Highland Park 120 Year Old Fully Functioning Calculator Reinventing The Conveyer Belt