\begin{table}%t5
%\centering
\par
\small\caption{\COs\ ($J=2$--1) line parameters.}\label{tab:c17o_line_parameter}
\begin{tabular}{lcc}
\hline\hline
 Source       &  \tdv\           & $\Delta v$  \\  
 &   K~\kms\         & \kms\\    
\hline
G35.19-1.73 & 7.1 (0.1) & 3.3 (0.1)      \\
G81.74+0.59 & 5.5 (0.1) & 3.3 (0.1)     \\ 
\hline
\end{tabular}
\end{table}