%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-22-2 on page 96.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{warpcol}\newcolumntype{L}[1]{>{\pcolbegin{r}{#1}}l<{\pcolend}}
\newcolumntype{R}[1]{>{\pcolbegin{r}{#1}}r<{\pcolend}}

\begin{document}
\begin{tabular}{@{} L{3.1}L{3.1}P{3.1}P{3.1}R{3.1}R{3.1} @{}} \hline
 \multicolumn{1}{l}{KT} & \multicolumn{1}{l}{long title}
   & \multicolumn{1}{c}{KT} & \multicolumn{1}{c}{long title}
   & \multicolumn{1}{r}{KT} & \multicolumn{1}{r}{long title}\\ \hline
 123.4 & 123.4 & 123.4 & 123.4 & 123.4 & 123.4 \\
  12.3 &  12.3 &  12.3 &  12.3 &  12.3 &  12.3 \\
   1.2 &   1.2 &   1.2 &   1.2 &   1.2 &   1.2 \\\hline
\end{tabular}
\end{document}