LaTeX Forum

\documentclass{scrartcl}
\usepackage{amsmath}
\begin{document}

\begin{equation}\label{haft1} 
  l_{H}=\frac{f_{t,F}}{4\tau_{m}}\cdot d 
  \qquad\qquad
  \begin{tabular}[t]{rcl} 
    $f_{t,F}$  &\ldots &tensile strength of the fiber\\ 
    $\tau_{m}$ &\ldots &mean acceptable bond stress\\ 
    $d$ &\ldots &diameter of the fiber 
  \end{tabular}
\end{equation}
\begin{equation}\label{haft2} 
  l_{H}=\frac{f_{t,F}}{4\tau_{m}}\cdot d 
  \qquad\qquad
  \begin{array}[t]{rcl} 
    f_{t,F}  &\ldots &\text{tensile strength of the fiber}\\ 
    \tau_{m} &\ldots &\text{mean acceptable bond stress}\\ 
    d &\ldots &\text{diameter of the fiber} 
  \end{array}
\end{equation}
\end{document}

\begin{equation}\label{haft}
l_{H}=\frac{f_{t,F}}{4\tau_{m}}\cdot d
\end{equation}
\begin{center}\begin{tabular}{rcl}
$f_{t,F}$  &\ldots &tensile strength of the fiber\\
$\tau_{m}$ &\ldots &mean acceptable bond stress\\
$d$ &\ldots &diameter of the fiber\\
\end{tabular}\end{center}