1 Materials the exhibit erratic combustion behaviour may increase the limits in tables 5 by a factor of up to 5 .On the
other hand,it may be found that ,for materials that exhibit very consistent burnning behaviour,d>1.5f even if d is reduced
to 0.1%(v/v),indicating that greater precision is possible .For pratical purposes,the accuracy and precision requirements specified for apparatus by this part of ISO
4589 are inadequate for significant discrimination using d<0.1%(v/v),and results obtained using this method have not
been found to be signifcantly different for d<0.2%(v/v).More precise determination of the mininum oxygen
concentration to just support combustion would require different apparatus and the use of different statistical relationships and factors to determine the value from a longer series of measurements
2 if for at least two out of the three specimens thus tested the flame is exitinguished before relevant criteria from table 3 are excecded.
3 a mixture of any two of the preceding gases having an oxygen concentration within the range of concentrations to be used for most test specimens
4 while stocks of surplus materials from the 1978/1980 interlaboratory trial last,sample with the oxygen index levels given in this table will be available from the Rubber and Plastics Reseach Association,Shawbury,Shrewsbury,Shropshire,United kingdom.
5 if the result is calculated from flow or pressure data for individual gas streams contributing to the mixture,it is necessary to allow for the proportion of oxygen present in streams other than a pure oxygen supply.
如果用计入混合气体中单个气流的流量或压力来计算结果，又必要考虑气流中含氧的比率，而不是氧气的纯度。
6 assuming that the streans are at the same pressure at 23摄氏度，颜色单词当假设讲，好像不对
7 For mixtures based on two gas streams,V1,V2,V3 become zero,as appropriate
8 these result relate to the particular material used for,and available following,the interlatoratory trial referred to in the introductory paragraph above.
9 step size to be used for successive changes d in oxygen concentration=0.2%(v/v).
10 column c contains the oxgen concentrations used for the measurements of c1 and for each of the 5 preceding measurements for n=6.
最后由 静静o(∩_∩) 于 2008-07-03 08:40:23编辑
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这样吧，明天如果你的那个 偶像还没翻的话我在试试。
