Fundamental standards. the international systems of units. description and rules for use. choice of multiples and sub - multiples.
基础标准。国际单位体系。说明和使用规则。倍数和约数的选择。
Fundamental standards. the international systems of units. description and rules for use. choice of multiples and sub - multiples.
基础标准。国际单位体系。说明和使用规则。倍数和约数的选择。
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