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C2[aw_, S_] := ((1 - Le) i aw BesselK[ 0, (1 + i) aw])/((1 +i) S BesselK[1, (1 +i) aw] +
i aw BesselK[0, (1 + i) aw]),ÇÒAbs[c2[aw, S]] == 0.674, Arg[c2[aw, s]] == 2.871,
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