Channel maps of ¹²CO and ¹³CO (3–2) emissions for filament G37. The intensity of the ¹²CO and ¹³CO (3–2) lines within the velocity range of 51 to 62 km s⁻¹ is depicted by green and red contours, respectively, with a step of 1 km s⁻¹. These contours represent regions where the signal-to-noise ratios of ¹²CO and ¹³CO exceed 6σ of the spectral lines, which correspond to approximately 1.9 and 2.1 K km s⁻¹, respectively. The intensity distribution of ¹²CO emission for each velocity channel is displayed as the gray background of the maps. The skeleton of filament G37 is represented by a cyan line, while four special dense clumps (C1–C4) are denoted by red crosses, which are consistent with those shown in Fig. 1.