my opinion is, that US is just lazy, all people who deal eith something requiring anything normal is in metric (science, engineering etc.)
In all US wirkshops I was 2 sets of tools - inches and metrics - thats really very practical right?
Same thing is the time - AM and PM crap - they call normal time "military" because when you need exact time stamp, tradition must go away.
Btw - why the hell do US measure their motors in ccm and not in galons?
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