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первичный эталон обеспечивает наивысшую точность воспроизведения данной единицы stresses
Makarov.	a basic standard reproduces a given unit to the highest level of accuracy attainable at the present state of the art; a primary standard reproduces a given unit to the highest level of accuracy attainable at the present state of the art; basic standard reproduces a given unit to the highest level of accuracy attainable at the present state of the art; primary standard reproduces a given unit to the highest level of accuracy attainable at the present state of the art