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Fig. 2
12CO 3–2 spectra toward IRS 63, from top to bottom: one red outflow lobe position (15″, 15″), one blue outflow lobe position (0″, 
5), the central position (0″, 0″) and one off-source position (
5, 20″). The integration limits are marked by dotted lines, baselines by dash-dotted lines and the source velocity by a dashed line.
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