You run a fabrication shop. Metal stock comes in through the receiving dock door and it goes out through the shipping dock door, and in between those two steps, you do a lot to it-cut it to length, form it, punch or pierce holes in it, throw some heat onto it to weld two pieces of it together, and maybe even do some machining to it. When all that's done, you might work over the surface of it, clean it, and powder coat it. These processes are the latest developments in a continuum that started well before recorded history. Since the dawn of time, manufacturing has relied heavily on material removal to make components.
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