Average spectra of SiO (2–1) (upper panel) and CH₃OH 5_1,5–4_0,4 (lower panel) along the three PV cuts U, M, L as in panel b of Fig. 9. The spectra are arranged from northeast to southwest along the cuts. The blue and red dashed lines indicate the V_LSR of clump MM3 and MM2 (93.9 km s^–1 and 91.3 km s^–1), with the thicker line corresponding to the V_LSR of either clump MM2 or MM3 at this position. The blue shaded regions indicate the line central velocity range from (91.3–2.5) km s^–1 to (93.9+2.5) km s^–1, which is excluded from the integration of the intensity maps of panel b in Fig. 9. In the upper plot, the two-component Gaussian fit to the SiO line is shown additionally, as green line. The broad-component subtracted spectrum (narrow-component line profile) is shown as magenta line. The velocity dispersions for the two components are indicated in the figure, in unit of km s^–1.