\begin{table}%t2
\caption{\label{tab2}Spatial and kinematic characteristics of the \twCO\ PdBI-only structures.}
\small%\centerline
 {
\begin{tabular}{llllllllll}
\hline\hline
&&&&&&&&& \\[-8pt]
Structure & $v_{\rm min}$ & $v_{\rm max}$ & $\Delta
v_{1/2}$  & $T_{\rm peak}$ & $W({\rm CO})$ & $\theta_{1/2}$ & $l_{\perp}$~$^a$  & $\rm PA$ & $n_{\HH}^{\rm max}$~$^b$ \\
 & \kms\ & \kms\ & \kms\ & K & \Kkms\ & arcsec & mpc & \deg\ & \cc\  \\  
\hline
1 & --5.7 & --5.2 & 0.1  & 0.6 & 0.06 & 4  & 3.0  & 109 &  1000\\
2 & --5.6 & --5.4 & 0.2  & 1.8 & 0.36 & 10 & 7.5  & 173 &  2400\\
3 & --5.2 & --4.8 & 0.2  & 2.4 & 0.48 & 9  & 6.8  & 62 &  3200\\
4 & --4.3 & --4.1 & 0.1  & 1.2 & 0.12 & 8  & 6.0  & 59  &  1000\\
5 & --3.4 & --2.6 & 0.4  & 4   & 1.6  & 12 & 9.0  & 91  &  8900\\
6 & --3.4 & --2.6 & 0.25 & 1.2 & 0.3  & 10 & 7.5  & 161 &  2000\\
7 & --3.2 & --3.0 & 0.15 & 1.2 & 0.18 & 15 & 11.3 & 173 &   800\\
8 & --1.7 & --1.3 & 0.15 & 1.2 & 0.18 & 9 & 6.8  & 59  &  1200\\
\hline
\end{tabular}}
\medskip
$^a$ Projected thickness of the filamentary structures  deconvolved from beam size;
$^b$~upper limit because computed as $n_{\HH}=N(\HH)/l_{\perp}$ instead of using~$l_{\parallel}$ with~$N(\HH)$ derived from~$W({\rm CO})$ (see~text).
\end{table}