Reference Material(ZT)
Julie · 2008-10-23 04:58 · 83454 次点击
Amaterialorsubstanceoneormoreofwhosepropertyvaluesaresufficientlyhomogeneousandwellestablishedtobeusedforthecalibrationofanapparatus,theassessmentofameasurementmethod,orforassigningvaluestomaterials.
btw,propertyhereithinkisthespecialqualityorcharacteristicofasubstance.Butnotquitesureaboutpropertyvalues.