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\end{itemize}
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\begin{figure}[h]
\begin{center}
 \Depsf[][70mm]{fig/fig1.ps}
 \caption{(a)5750K($BB@M[$NI=LL29EY(B)$B$H(B 245K($BOG@1Bg5$$NJ?6Q29EY(B)$B$N9uBNmU<M$N(B
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(b)$B@2E7;~$K$*$1$kBg5$$N1tD>J}8~$G$N5[<}(B.
$B<gMWBg5$@.J,$N5[<}%P%s%I$,<($5$l$F$$$k(B(Houghton, 1986)}
 \Dfiglab{fig: 1}
\end{center}
\end{figure}






