Yeah, pack machine parts in grease inside a heavy stainless drum, and you can get them out in a thousand years (or as long as the drum lasts anyway) and assemble them into working machinery - or working guns. I've also encountered survivalist stashes with drums full of shop tools, stashes of technical manuals that cover building everything up to CMOS micro-etched onto ceramic Norsam disks, etc.
Everybody thinks those guys are just about guns & military-ish crap, but some of them have seriously thought about what it takes to rebuild.