How is the unit of amperage determined in the International System of Units?

For a unit of current strength 1 A in the International System of Units, the strength of a constant current is taken, which, when passing through two parallel conductors of infinite length and small cross-sectional area, located in a vacuum at a distance of 1 m from one another, would cause a magnetic interaction force between these conductors equal to 2 ten-millionth newtons per meter of length.

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