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Fig. A.4


Position-velocity diagrams of 13CO for a) MON R2, b) S156, c) DR17/L906, and d) M17/M18. The positions for 13CO are the same as in Fig. 2. a) For the MON R2 region: contour levels are 0.5 to 3 in steps of 0.5 K. b) For the S156 region: contour levels are 0.6 to 2.1 in steps of 0.3 K. c) For the DR17/L906 region: contour levels are 0.3 to 1.8 in steps of 0.3 K. d) For the M17/M18 region: contour levels are 0.8 to 3.8 in steps of 0.5 K.

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