unambiguous reference meaning in English

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Note 4 the term “ identified metrological specification ” means that it must be clear from the calibration certificate which specification the measurements have been compared with , by including the specification or by giving an unambiguous reference to the specification
注4 : “确定的计量规范”是指在校准证书中必须清楚表明该测量已与何种规范进行过比对,这可以通过在证书中包含该规范或明确指出已参照了该规范来达到