介绍了等效渗透张量的计算方法，并给出其有效性的判定标准。
The method for calculating equivalent permeability tensor is introduced, the criterions for determining the tensor validity are presented.
用该法对荷兰国家计量院制备的氮中二氧化硫标准气体进行比对试验，取得了良好的等效性。
The sulfur dioxide calibration gases in nitrogen from Netherlands National Institute of Metrology was determined by the method, and an ideal degrees of equivalence was obtained.
本标准与EN 10297 - 1：20 03《用于机械和一般工程用途的无缝钢管交货技术条件》的一致性程度为非等效。
This standard and en 10297-1:2003 "the condition of technology of delivery of seamless steel tube that is used at machinery and average project utility" consistency degree is blame equivalent.
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