There was a workshop turning out the Antikythera mechanism, it wasn't a one-off device. It had a user manual. Lathes go ever further back. Whoever built the p

There was a workshop turning out the Antikythera mechanism, it wasn't a one-off device. It had a user manual. Lathes go ever further back. Whoever built the pyramids had sufficient precision to make flat surfaces similar to modern surface plates. The machines have been around for a very long time, powering them with other machines was part of it. There's a lot to untangle here.