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\psset{unit=1pt}
% rear edges
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}( 18.57, 59.84)( 99.69,105.71)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(195.28, 76.83)( 99.69,105.71)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}( 99.69,105.71)( 98.04,206.54)
% side edges
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(133.86,  0.00)( 18.57, 59.84)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(133.86,  0.00)(195.28, 76.83)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}( 18.57, 59.84)(  0.00,196.81)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(  0.00,196.81)( 98.04,206.54)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(195.28, 76.83)(210.00,200.54)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(210.00,200.54)( 98.04,206.54)
% x axis
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\put(133.86,  0.00){\pscircle*{1.5pt}}
\put(166.59, 24.09){\begin{rotate}{-54.654}\makebox(0,0)[lt]{\scalebox{0.884}{1}}\end{rotate}}
\put(160.26, 33.02){\pscircle*{1.5pt}}
\put(185.61, 50.01){\begin{rotate}{-53.806}\makebox(0,0)[lt]{\scalebox{0.782}{2}}\end{rotate}}
\put(179.99, 57.69){\pscircle*{1.5pt}}
\put(200.33, 70.09){\begin{rotate}{-53.143}\makebox(0,0)[lt]{\scalebox{0.695}{3}}\end{rotate}}
\put(195.28, 76.83){\pscircle*{1.5pt}}
\put(193.80, 14.28){\begin{rotate}{0.000}\makebox(0,0)[lt]{$x$}\end{rotate}}
% y axis
\put(212.80,207.91){\begin{rotate}{69.210}\makebox(0,0)[lb]{\scalebox{0.782}{1.00}}\end{rotate}}
\put(210.00,200.54){\pscircle*{1.5pt}}
\put(150.24,210.36){\begin{rotate}{64.817}\makebox(0,0)[lb]{\scalebox{0.721}{5.00}}\end{rotate}}
\put(147.21,203.91){\pscircle*{1.5pt}}
\put(101.15,212.28){\begin{rotate}{61.556}\makebox(0,0)[lb]{\scalebox{0.648}{9.00}}\end{rotate}}
\put( 98.04,206.54){\pscircle*{1.5pt}}
\put(166.29,244.49){\begin{rotate}{0.000}\makebox(0,0)[lb]{$y$}\end{rotate}}
% z axis
\put(  9.16, 58.93){\begin{rotate}{5.493}\makebox(0,0)[r]{\scalebox{0.757}{0.00}}\end{rotate}}
\put( 18.57, 59.84){\pscircle*{1.5pt}}
\put(  5.62, 82.65){\begin{rotate}{4.718}\makebox(0,0)[r]{\scalebox{0.792}{1.00}}\end{rotate}}
\put( 15.37, 83.46){\pscircle*{1.5pt}}
\put(  1.82,108.08){\begin{rotate}{3.888}\makebox(0,0)[r]{\scalebox{0.824}{2.00}}\end{rotate}}
\put( 11.94,108.77){\pscircle*{1.5pt}}
\put( -2.27,135.39){\begin{rotate}{2.999}\makebox(0,0)[r]{\scalebox{0.852}{3.00}}\end{rotate}}
\put(  8.25,135.95){\pscircle*{1.5pt}}
\put( -6.67,164.82){\begin{rotate}{2.044}\makebox(0,0)[r]{\scalebox{0.873}{4.00}}\end{rotate}}
\put(  4.28,165.21){\pscircle*{1.5pt}}
\put(-11.42,196.61){\begin{rotate}{1.016}\makebox(0,0)[r]{\scalebox{0.887}{5.00}}\end{rotate}}
\put(  0.00,196.81){\pscircle*{1.5pt}}
\put(-45.06,118.78){\begin{rotate}{0.000}\makebox(0,0)[r]{$z$}\end{rotate}}
% surface
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\newgray{shade}{0.8190}\psset{fillcolor=shade}\pspolygon(124.16,146.68)( 97.85,107.96)( 49.78,100.01)( 76.16,133.97)
\newgray{shade}{0.7159}\psset{fillcolor=shade}\pspolygon(210.00,200.54)(190.64,164.29)(124.16,146.68)(146.14,179.02)
\newgray{shade}{0.8952}\psset{fillcolor=shade}\pspolygon( 97.85,107.96)( 65.76, 60.75)( 18.57, 59.84)( 49.78,100.01)
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\newgray{shade}{0.8429}\psset{fillcolor=shade}\pspolygon(166.63,119.33)(136.07, 62.11)( 65.76, 60.75)( 97.85,107.96)
% front edges
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(133.86,  0.00)(140.34,182.41)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(140.34,182.41)(  0.00,196.81)
\psline[linestyle=dotted,linewidth=0.9pt,linecolor=black,fillstyle=none]{-}(140.34,182.41)(210.00,200.54)
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