\begin{center}

\begin{texdraw}

\setunitscale 0.35
%0.3
%0.45

\arrowheadsize l:0.26 w:0.13 \arrowheadtype t:F

\htext(-0.9 0){\normalsize \textsl{����l}}
\move (0 0) \ravec (1 -0.75) \htext(0.8 -1.4){$C_{1k}$\,\,\,...}
\move (-0.75 0) \ravec (-1.25 -0.75) \htext(-2.4 -1.4){$C_{11}$}
\move (0.75 0) \ravec (2.25 -0.75) \htext(3 -1.4){$C_{1n}$}

\rmove (-2 -0.4)
\ravec (2 -1.5) 
\rmove (-2 1.5)
\ravec (-0.5 -1.5) \rmove (0.5 1.5)
\ravec (-3 -1.5) \rmove (3 1.5)
\rmove (-3 0)
\ravec (0 -1.5) \rmove (0 1.5)
\ravec (5 -1.5) \rmove (-5 1.5)
\ravec (3.5 -1.5)
\htext(3 -3.9){$C_{2m}$} 
\htext(-2.4 -3.9){$C_{21}$} 
\htext(0.2 -3.9){$C_{22}$\,\,\,\,\,...}
\htext(3 -4.3){\,\,.} 
\htext(-2.4 -4.3){\,\,.} 
\htext(0.2 -4.3){\,\,.}
\htext(3 -4.5){\,\,.} 
\htext(-2.4 -4.5){\,\,.} 
\htext(0.2 -4.5){\,\,.}
\htext(3 -5.2){$C_{kl}$} 
\htext(-2.4 -5.2){$C_{k1}$} 
\htext(0.2 -5.2){$C_{k2}$\,\,\,\,\,...}

\rmove (0.3 -0.2)
\ravec (0 -1) \rmove (0 1)
\ravec (-2.5 -1) \rmove (2.5 1)
\ravec (2.5 -1) \rmove (-2.5 1)
\rmove (-2.5 0)
\ravec (0 -1) \rmove (0 1)
\ravec (2.5 -1) \rmove (-2.5 1)
\ravec (5 -1) \rmove (-5 1)
\rmove (5 0)
\ravec (0 -1) \rmove (0 1)
\ravec (-2.5 -1) \rmove (2.5 1)
\ravec (-5 -1) \rmove (5 1)
\htext(3 -6.9){$x_l$} 
\htext(-2.4 -6.9){$x_1$} 
\htext(0.2 -6.9){$x_2$\,\,\,\,\,\,\,\,...}

\end{texdraw}

\end{center}
