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New Measurement system: New definitions of fundamental units Kilogram, ampere, Kelvin and mol became effective from 20th May 2019. Measurement is something essential for research, science, economy and business (commercial purpose). As it is important in a global network system so that man must agree how and what is measured. The basis for that is since 1960 the international unit systems in short SI (French: Système international d’unitès). It is the most widely spread unit system for physical dimensions with the seven fundamental units ampere, candela, Kelvin, kilogram, meter, mol and second.
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