Lot fewer man hours to build & maintain the equipment.
That's one of a myriad of reasons Keynesian stimulus / "shovel ready" doesn't work anymore.
We don't build roads with lots of manual labor anymore, and we can't build 'em to todays standards substituting manpower for machines if we wanted to.
Same idea, different trade is welding and submarines near me (Electric Boat). They developed a robot to make some of the more difficult/awkard to reach welds.
It being a machine can safely hold a much stronger arc then a human...so the Navy redesigned welds (basically from square to being on an angle so a greater surface area got fused together) to make stronger hulls.
Today's subs you CAN'T go back to using a human welder...they're designed using welds only a machine can make.
We could go back to spending like Reagan and only employ a fraction of welders, draftsmen, and many others whose jobs have become techonologically obsolete.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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