\begin{table} %tb9
\caption{\label{tab_iso}Isotopologue ratios.}
\small%\centering
\par
\begin{tabular}{llllll}
\hline
\hline \noalign{\smallskip}
Ratio & Extended ridge & Compact ridge & Plateau & Hot core &  Solar
 isotopic abundance\tablefootmark{1} \\
\hline\noalign{\smallskip}
OCS / OC$^{34}$S & 20~$\pm$~8 & $\ga$4 & 15~$\pm$~5 & $\ga$5 & $^{32}$S/$^{34}$S $\simeq$ 22.5  \\
OCS / OC$^{33}$S & 40~$\pm$~22 & $\ga$33 & 75~$\pm$~29 & $\ga$50 & $^{32}$S/$^{33}$S $\simeq$ 127 \\
OCS / O$^{13}$CS & 33~$\pm$~12 & $\ga$7 & 25~$\pm$~9 & $\ga$15 & $^{12}$C/$^{13}$C $\simeq$ 90\\
OCS / $^{18}$OCS & 200~$\pm$~112 & $\ga$42 & 250~$\pm$~135 & $\ga$150 & $^{16}$O/$^{18}$O $\simeq$ 499 \\
O$^{13}$CS / O$^{13}$C$^{34}$S & $\ga$6 & $\ga$6 & $\ga$2 & $\ga$14 & $^{32}$S/$^{34}$S $\simeq$ 22.5\\
OC$^{34}$S / O$^{13}$C$^{34}$S & $\ga$10 & $\ga$14 &
$\ga$2 & $\ga$42 & $^{12}$C/$^{13}$C $\simeq$ 90\\
OCS / $^{17}$OCS & $\ga$400 & $\ga$150 & $\ga$750 & $\ga$750 & $^{16}$O/$^{17}$O $\simeq$ 2625 \\
OCS / OC$^{36}$S & $\ga$400 & $\ga$100 & $\ga$375 & $\ga$500 & $^{32}$S/$^{36}$S $\simeq$ 4747 \\
O$^{13}$CS / OC$^{34}$S & 0.6~$\pm$~0.2 & 0.6~$\pm$~0.2 &
 0.6~$\pm$~0.2 & 0.33~$\pm$~0.13 & ($^{13}$C/$^{12}$C) $\times$ ($^{32}$S/$^{34}$S) $\simeq$ 0.25  \\
O$^{13}$CS / OC$^{33}$S & 1.2~$\pm$~0.7 & 4~$\pm$~2 & 3~$\pm$~2 & 3~$\pm$~2 &
 ($^{13}$C/$^{12}$C) $\times$ ($^{32}$S/$^{33}$S) $\simeq$ 1.4  \\
O$^{13}$CS / $^{18}$OCS & 6~$\pm$~3 & 6~$\pm$~3 & 10~$\pm$~6 & 10~$\pm$~6 & ($^{13}$C/$^{12}$C) $\times$ ($^{16}$O/$^{18}$O) $\simeq$ 5.5  \\
OC$^{33}$S / OC$^{34}$S & 0.5~$\pm$~0.3 & 0.1~$\pm$~0.2 & 0.20~$\pm$~0.11 & 0.1~$\pm$~0.2 &
 $^{33}$S/$^{34}$S $\simeq$ 0.2  \\
$^{18}$OCS / OC$^{34}$S & 0.10~$\pm$~0.06 & 0.10~$\pm$~0.06 &
 0.16~$\pm$~0.03 & 0.03~$\pm$~0.02 & ($^{18}$O/$^{16}$O) $\times$ ($^{32}$S/$^{34}$S) $\simeq$ 0.05  \\
$^{18}$OCS / OC$^{33}$S & 0.20~$\pm$~0.10 & 0.6~$\pm$~0.5 & 0.8~$\pm$~0.2 & 0.3~$\pm$~0.2 & ($^{18}$O/$^{16}$O) $\times$ ($^{32}$S/$^{33}$S) $\simeq$ 0.25  \\
\noalign{\smallskip}
o-H$_2$CS / o-H$_2$C$^{34}$S & 20~$\pm$~7 & 25~$\pm$~10 &
35~$\pm$~13 & 14~$\pm$~6 & $^{32}$S/$^{34}$S $\simeq$ 22.5\\
p-H$_2$CS / p-H$_2$C$^{34}$S & 21~$\pm$~8 & 25~$\pm$~8 &
38~$\pm$~14 & 17~$\pm$~7 & $^{32}$S/$^{34}$S $\simeq$ 22.5\\
o-H$_2$CS / o-H$_2$$^{13}$CS & 40~$\pm$~16 & 50~$\pm$~20 &
47~$\pm$~18 & 20~$\pm$~8 & $^{12}$C/$^{13}$C $\simeq$ 90\\
p-H$_2$CS / p-H$_2$$^{13}$CS & 43~$\pm$~16 & 50~$\pm$~18 &
46~$\pm$~17 & 20~$\pm$~9 & $^{12}$C/$^{13}$C $\simeq$ 90\\
HDCS / (o-H$_2$CS+p-H$_2$CS) & 0.07~$\pm$~0.03 & 0.040~$\pm$~0.012 &
0.040~$\pm$~0.012 & 0.050~$\pm$~0.02 & D/H $\simeq$ 3.4 $\times$ 10$^{-5}$\\
o-H$_2$C$^{34}$S / o-H$_2$$^{13}$CS & 2.0~$\pm$~0.8 & 2.0~$\pm$~0.7 &
1.3~$\pm$~0.5 & 1.4~$\pm$~0.5 & ($^{34}$S/$^{32}$S) $\times$ ($^{12}$/C$^{13}$C) $\simeq$ 4\\
p-H$_2$C$^{34}$S / p-H$_2$$^{13}$CS & 2.0~$\pm$~0.8 & 2.0~$\pm$~0.8 &
1.2~$\pm$~0.4 & 1.2~$\pm$~0.4 & ($^{34}$S/$^{32}$S) $\times$ ($^{12}$/C$^{13}$C) $\simeq$ 4\\
(o-H$_2$C$^{34}$S+p-H$_2$C$^{34}$S)/ HDCS & 0.7~$\pm$~0.2 & 1.0~$\pm$~0.3 &
0.7~$\pm$~0.2 & 1.3~$\pm$~0.4 & ($^{34}$S/$^{32}$S) $\times$ H/D $\simeq$
 2 $\times$ 10$^{-6}$\\
(o-H$_2$$^{13}$CS+p-H$_2$$^{13}$CS)/ HDCS & 0.34~$\pm$~0.12 & 0.5~$\pm$~0.2 &
0.5~$\pm$~0.2 & 1.0~$\pm$~0.3 & ($^{13}$C/$^{12}$C) $\times$ H/D $\simeq$ 3.8 $\times$ 10$^{-7}$\\
\noalign{\smallskip}
$^{13}$CS / $^{13}$C$^{34}$S & ... & $\ga$6  & ... &
$\ga$15 & $^{32}$S/$^{34}$S $\simeq$ 22.5\\
C$^{34}$S / $^{13}$C$^{34}$S & ... & $\ga$16 & ... & 
$\ga$18 & $^{12}$C/$^{13}$C $\simeq$ 490\\
$^{13}$CS / $^{13}$C$^{33}$S & ... & $\ga$21 & ... & 
$\ga$30 & $^{32}$S/$^{33}$S $\simeq$ 127\\
C$^{33}$S / $^{13}$C$^{33}$S & ... & $\ga$14 & ... & 
$\ga$20 & $^{12}$C/$^{13}$C $\simeq$ 90\\
$^{13}$CS / C$^{34}$S & 0.7~$\pm$~0.2 & 0.37~$\pm$~0.14 &
0.6~$\pm$~0.2 & 0.9~$\pm$~0.3 & ($^{13}$C/$^{12}$C) $\times$ ($^{32}$S/$^{34}$S) $\simeq$ 0.25\\
$^{13}$CS / C$^{33}$S & 4.0~$\pm$~1.3 & 1.5~$\pm$~0.7 & 1.2~$\pm$~0.4
& 1.5~$\pm$~0.5 & ($^{13}$C/$^{12}$C) $\times$ ($^{33}$S/$^{34}$S) $\simeq$ 1.4\\
C$^{33}$S / C$^{34}$S & 0.17~$\pm$~0.03 & 0.25~$\pm$~0.10 & 0.5~$\pm$~0.2 & 0.6~$\pm$~0.2 &
$^{33}$S/$^{34}$S $\simeq$ 0.2\\
\hline 
\end{tabular}
\tablefoot{Isotopologue ratios for the OCS, H$_2$CS, and CS species obtained 
with the column density results of the Tables~\ref{tab_cd}, 
\ref{tab_cd_h2cs}, and~\ref{tab_cdcs}.\\
\tablefoottext{1}{\citet{and89}.}}
\end{table}