I've wondered many times how generations prior to us had manufacturing accuracy.
How to Measure to a MILLIONTH of an Inch (The Dawn of Precision)
More similar vids https://www.youtube.com/c/machinethinking/videos
How to Measure to a MILLIONTH of an Inch (The Dawn of Precision)
More similar vids https://www.youtube.com/c/machinethinking/videos