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59A0q0exp()AiqnjB0Aexp()nBij0BAnqA0Bexp()nAiqnj(,)exp()nhuvij=f(,)Fxy(,)huv(,){(,)}Fxyhuv=ℑ{}ℑ⋅TN911.73A1007-9416(2011)08-0059-0261)tan(*)cos(/)(*iizixRPctgRPbqq==iqiMibiMijiNiqibiqibiM)1(cos21)(+=xxf)(1xf-xgg
