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% OR-gate WEST
\newsavebox{\orw}
\savebox{\orw}(11,6){
\begin{picture}(11,6)
\bezier{60}(9,6)(4,6)(2,3) % top section of pointed curve
\bezier{60}(9,0)(4,0)(2,3) % bottom section of pointed curve
\bezier{40}(9,6)(7,3)(9,0) % back curve
\put(0,3){\line(1,0){2}} % output line
\put(11,5){\line(-1,0){2.5}} % top input line
\put(11,1){\line(-1,0){2.5}} % bottom input line
% NB intersection of input lines & back curve is estimated (not calculated)!
\end{picture}
}
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