\begin{table}%t1
\caption{\label{GBdualdust}The sample of 21 Galactic Bulge PNe with dual-dust chemistry observed
 with Spitzer/IRS (program $\#$3633).}             
%\centerline
{\small \begin{tabular}{r l c c c c c c} 
\hline  \hline \noalign{\smallskip}
IRAS name    & PN name  & RA       & Dec  &  Spectral type$^{{a}}$  & Optical diameter$^{{d}}$ & Distance from GC & Dust type \\ 
 &  & J2000.0    & J2000.0   &   & (arcsec) & ($\degr$)  &  \\
\hline\noalign{\smallskip}
17480$-$3023 & M 3-44   & 17 51 18.7 & --30 23 53 & [WC11]$^{{b}}$  & 4.4 & 1.91 & mixed \\
17549$-$3347 & H 1-43   & 17 58 14.5 & --33 47 37 & [WC11]$^{{b}}$  & 2.0 & 5.56 & mixed \\
17434$-$3307 & M 1-27   & 17 46 45.5 & --33 08 35 & [WC11]$^{{b}}$ & 5.3 & 4.21 & mixed \\
18061$-$2505 & MaC 1-10 & 18 09 12.4 & --25 04 35 & [WC8]$^{{b}}$   &10.0 & 6.52 & mixed \\
17355$-$2206 & M 1-25   & 17 38 30.3 & --22 08 39 & [WC6]$^{{b}}$   & 4.6 & 6.99 & mixed \\ 
17425$-$2056 & M 3-15   & 17 45 31.8 & --20 58 06 & [WC5]$^{{b}}$   & 4.2 & 7.97 & mixed \\
17388$-$2440 & Hb 4     & 17 41 53.1 & --24 42 03 & [WC4]$^{{b}}$   & 6.2 & 4.32 & mixed \\ 
18259$-$3132 & Cn 1-5   & 18 29 11.7 & --31 29 59 & [WC4]$^{{b}}$   & 7.0 & 9.75 & mixed \\
17389$-$2409 & M 2-14   & 17 41 57.7 & --24 11 11 & {\it wels}$^{{b}}$    & 0.0 & 4.82 & mixed \\ 
17496$-$2221 & M 1-31   & 17 52 41.4 & --22 21 57 & {\it wels}$^{{b}}$    & 0.0 & 6.76 & mixed \\
18006$-$3117 & M 2-27   & 18 03 52.6 & --31 17 47 & {\it wels}$^{{b}}$    & 4.8 & 4.60 & mixed \\
18054$-$2217 & M 1-40   & 18 08 26.0 & --22 16 53 & {\it wels}$^{{b}}$    & 5.0 & 8.40 & mixed \\
18094$-$2450 & H 1-61   & 18 12 34.0 & --24 50 01 & {\it wels}$^{{b}}$    & 0.0 & 7.27 & mixed \\
17156$-$3135 & Th 3-4   & 17 18 51.9 & --31 39 06 & none$^{{b}}$    & 0.0 & 6.38 & mixed \\
17178$-$2900 & M 3-38   & 17 21 04.3 & --29 02 60 & none$^{{c}}$    & 0.0 & 5.37 & mixed \\
17217$-$2803 & M 3-8    & 17 24 52.2 & --28 05 54 & none$^{{b}}$    & 5.4 & 4.64 & mixed$^{{e}}$ \\
17262$-$2623 & H 1-16   & 17 29 23.4 & --26 26 05 & none$^{{b}}$    & $<$5.0 & 4.37 & mixed \\
17521$-$2144 & Hb 6     & 17 55 07.1 & --21 44 41 & none$^{{b}}$    & 5.0 & 7.50 & mixed \\
17523$-$3033 & H 1-40   & 17 55 36.0 & --30 33 32 & none$^{{b}}$    & 3.8 & 2.71 & mixed \\
18006$-$3241 & H 1-50   & 18 03 53.5 & --32 41 42 & none$^{{b}}$    & $<$10. & 5.43 & mixed \\
18100$-$3220 & H 1-62   & 18 13 17.9 & --32 19 42 & unknown                & 0.0 & 6.85 &  mixed \\
\hline
\end{tabular}}
\medskip
$^{{a}}$ None -- neither [WC]~nor {\it wels}; $^{{b}}$ \cite{Gorny2004};  $^{{c}}$~\cite{Gorny2008};
$^{{d}}$ Strasbourg-ESO Catalogue of Galactic Planetary Nebulae, \cite{Acker1992}, 0.0 --~PN is a point-like source; $^{{e}}$ PAHs presence is tentative.
\end{table}