\begin{table}%t1
   \caption{\label{t:sb2}Properties of double-lined spectroscopic binaries
               detected in our spectra: identification, radial
              velocities, {\it FWHM} of spectral lines corrected
              for instrumental broadening, and ratio of equivalent
              width at about 6400~\AA. The epoch of the observations
              is listed in Table~\ref{t:res1}.}
     \small%\centering
\par
             \begin{tabular}{cccc}
         \hline\hline
               Object   & $RV$ & {\it FWHM} & {\it EW} ratio  \\ 
                  &~km~s$^{-1}$ &~km~s$^{-1}$ & \\
               \hline
\object{HIP~35564Ba}  &  7.22~$\pm$~0.52 &  31.2~$\pm$~5.5  & 0.22~$\pm$~0.03  \\ 
\object{HIP~35564Bb}  & 76.02~$\pm$~0.27 &  16.9~$\pm$~2.6  &                \\
             &                &                &                \\
\object{HIP~35733Aa}  & 72.34~$\pm$~0.19 & 12.45~$\pm$~0.45 & 0.82~$\pm$~0.04  \\ 
\object{HIP~35733Ab}  &--4.97~$\pm$~0.24 & 12.13~$\pm$~0.74 &                \\
             &                &                &                \\
\object{HIP~76816Aa}  &--48.83~$\pm$~0.37&  22.6~$\pm$~1.2  & 0.33~$\pm$~0.01  \\ 
\object{HIP~76816Ab}  & --29.9~$\pm$~1.2 &  18.5~$\pm$~1.2  &                \\
             &                &                &                \\
\object{HIP~78416Aa}  &  58.9~$\pm$~1.0  &  44.2~$\pm$~2.1  & 0.87~$\pm$~0.06  \\ 
\object{HIP~78416Ab}  & --1.8~$\pm$~2.2  &  41.1~$\pm$~4.0  &                \\
             &                &                &                \\
\object{HIP~81395A}   &--24.97~$\pm$~0.31&  20.6~$\pm$~1.2  & 0.76~$\pm$~0.06  \\ 
\object{HIP~81395B}   & --3.10~$\pm$~0.51&  15.9~$\pm$~1.2  &                \\
         \hline
      \end{tabular}
\end{table}