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单词 weathering microindices
释义
weathering microindices

Geology and Earth Sciences
  • Indices used in the grade classification of rock material by microscopic examination in the laboratory. The indices are: Imp (micropetrographic index), the percentage of sound constituents divided by the percentage of unsound constituents; and Ifr (microfracture index), the number of microcracks in a 10 mm traverse of thin section.


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