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Fig. 16

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Comparison between 13CO 2–1 (upper left), C18O 2–1 (upper right), H2CO 31,2 − 21,1 (lower left) and HCO 31,2 − 21,1 (lower right). For all species the emission is integrated from 1 to 5 km s-1. The contours are shown in steps of 9 Jy beam-1 km s-1 for the CO isotopologues and 3 Jy beam-1 km s-1 for the H2CO isotopologues.

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