At the section with non lithology key bed, the key bed could be selected according to the lithology combination and the particle variation.
在无岩性标志层的层段，则根据岩性组合及粒度变化选择标志层。
The test results show that wear particle analysis can be used to compare the effect of the variation of a particular factor on wear processes.
试验结果表明，磨损粒子分析能够用来比较特殊因素的变化对磨损过程发生的影响。
For different material of particle electrode, there are reverse trends of particle electrode potential with the variation of inorganic salt concentration and organic compound concentration.
对不同的粒子电极材料，粒子电极电位随无机盐含量和有机物含量变化的趋势不同。
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