Fig. 11
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Column density ratios between molecular species and PN. The different molecules are identified by different colours, and the measurements obtained in regions 1 and 2 are separated on the x-axis as indicated. For each molecule, we plot two values of Ntot/Ntot[PN], which correspond to the two Ntot[PN] obtained in the Tex velocity interval given in Sect. 3.3.2 (Table 2).
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