If you dismantled an automobile engine piece by piece, you'd have it laid out of the ground: cylinder block, crankshaft, camshaft, valves, pistons, connecting rods, intake and exhaust maninfolds, etc. A steel mill dismantled piece by piece would probably leave the building that houses the mill intact and would just remove the moving parts of the mill: furnace, conveyors, storage bins, etc. The parts would likely not be laid out on the ground, but rather would be trucked away, either to be reassembled somewhere else (for example, in a Third World country) or to be melted down for scrap.
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