Some may think metric is in? Tell the US that! I believe the main issue is that US factory tooling is geared up in imperial though have metric equivalent for the overseas market. It would cost billions to change their aircraft build industry etc etc. When i was in the airforce in the 80's 90's, all the aircraft manuals were imperial, same as other military hardwear. Metric is reserved for Europe! So todays generation if they can't work with both, maybe back to school? lol
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