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a*(Sl^((-1)/m)-1)^(1-m)+C4*ln(D-B/(1-Sl))=0
ÆäÖУºa=60, m=0.57, C4=127, D=4.868*104, B=0.6899.
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60¡Á(Sl^((-1)/0.57)-1)^0.43+127¡Áln(48680-0.6899/(1-Sl))=0.
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