si单位

• Where traceability of measurements to si units is not possible and / or not relevant , the same requirements for traceability to , for example , certified reference materials , agreed methods and / or consensus standards , are required as for calibration laboratories ( see 5 . 6 . 2 . 1 . 2 )
  2测量无法溯源到si单位或与之无关时,与对校准实验室的要求一样,要求测量能够溯源到诸如有证参考物质、约定的方法和(或)协议标准(见5 . 6 . 2 . 1 . 2 )