7.11.5 loadFlatPs

     [conv2FlatPs( "circuit.pdf", "circuit.fps", TmpPath),  
      stock:= loadFlatPs( [TmpPath,"circuit.fps"] ),  
      drawFlatPs( 0, stock, [scale:=1, hollow:=1] )  
     ]

will permit to load and draw the content of that file in TeXgraph without the fillings.