1 янв 1795 г. - Metric System
Описание:
The French Revolutionary government introduces the metric system, now known as the International System of Units. One meter was preliminary defined as one ten millionth of the distance between the North Pole and the Equator crossing through Paris. Of course, the meter definition has evolved over the centuries, but is still considered today as the length reference to which every measuring tool refers.
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History of Metrology Tools
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