Concrete Pourer!
50 odd years ago I remember lugging bags of concrete up a hill. They weighed 112 lb each (I think) but as I remember putting one on each shoulder, maybe they weighed something less. Thousands of them!
Now this magnificent machine just pumps it all over the obstacles. A great advancement for the building industry. Another great invention is the nail gun. God, I wish I had one of them in the 1950s. Ever tried driving 1000s of nails into a hardwood ceiling, or floor!
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