Hot answers tagged transportation
The Wikipedia article you refer to gives a reference which says that this change "increased speed and stability". Which can be explained, of course. Suppose you have two gauges, 1524 and 1520 with the same tolerance, say 4. This (very roughly) means that the first one will really have width from 1520 to 1528, and the second from 1516 to 1524. ("Roughly ...
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