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简答题已知:Δtm=142.46μs/m,Δtmf=618.98μs/m,测量时差Δtlog=158.83μs/m,求孔隙度φ?
  • φ=(Δtlog-Δtma)/(Δtmf-Δtma)
    =(158.83-142.46)/(1618.98+142.46)
    =16.37/761.44=0.021=2.1%
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