The CIPM modified the 1992 instructions for the practical realization of the definition by further reducing the uncertainties and increasing the number of recommended radiations from eight to twelve.

 
  • 1997年:CIPM修改了1992指示為定義的實(shí)用認識由進(jìn)一步減少不確定性和增加被推薦的輻射的數量從八到十二。
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