\begin{table}%T6
\caption{\label{AbuRatio}Abundance ratios in the shocked regions and in the cloud,
as derived from the column densities of Table~\ref{ColumnDens}.
References for other outflows: L1157-B1 and
L1157-B2: \citet{1997ApJ...487L..93B}; CB3: \citet{1999AetA...350..659C};
L1448, B1 and CepA:
\citet{1992AetA...254..315M}; NGC 2071: \citet{1993ApJ...403L..21C}.}
%\centering
\par
\begin{tabular}{c|ccccccc}
\hline \hline 
Region & $\rm SO/H_{2}CO$ & SO$_2$/SO & $\rm SO_{2}/H_{2}CO$ & H$_2$S/SO & SiO/SO & SiO/SO$_{2}$ & $\rm SiO/H_{2}CO$ \\
Cloud        & 28 & $\sim$$0.04$ & 1 & $\sim$$0.03$ & $\sim$$4 \times 10^{-4}$ & 
0.01 & 0.01 \\
\hline
E1          & 2 & 0.5 & 1.1 & $\leq$$6$ & 0.03 & 0.06 & 0.06 \\
E2(LVC)      & $\geq$$4$ & $\leq$$0.1$ & -- & $\leq$$80 $ & 0.06 & $\geq$$0.5$ & $\geq$$0.2$  \\
E2(HVC)     & $\geq$$5$ & $\leq$0.1 & -- & $\leq$$150 $ & 0.1 & $\geq$$0.9$ &
$\geq$$0.5$ \\
W1          & 7 & 0.1 & 0.7 & $\leq$$3$ & $6\times 10^{-3}$ & 0.06 & 0.04 \\
W2          & 2.5  & 0.3 & 0.8 & $\leq$$9$ & 0.02 & 0.05 & 0.04 \\
\hline
L1157-B1 & 0.6--1 & 0.6--1 & 0.4--1 & 0.8--1.3 & 0.2--0.3 & 0.3 &
0.1--0.3 \\
L1157-B2 & 1 & 1--3 & 1--3 & 0.7--2 & 0.1--0.4 & 0.1 & 0.1--0.4 \\
CB3 & -- & $\sim$1 & -- & $\leq$1 & $\ll$1 &  $\ll$1 & --\\
L1448 & -- & -- & -- & -- & 0.3 & -- & -- \\ 
B1 & -- & -- & -- & -- & 0.1 & -- & -- \\ 
CepA & -- & -- & -- & -- & 0.08 & -- & -- \\ 
NGC 2071 & -- & -- & -- & -- & 0.01--0.05 & -- & -- \\
\hline
\end{tabular}
         \end{table}