Spectra of the three regions in G323.18+0.15. Upper panels from left to right are the integral intensities corresponding to the velocity ranges from −64.63 to −63 km s⁻¹, from −67.25 to −64.63 km s⁻¹, and from −69 to −67.25 km s⁻¹. The corresponding black contours start at 3Kkm s⁻¹ and increase in steps of 2.2, 6.1, and 1.3Kkms⁻¹, respectively. Lower panels: for the 3 × ¹²CO(J = 1−0), 1.5 × ¹³CO(J = 2−1), and 1.5 × C¹⁸O(J = 2−1) spectra extracted at three different positions of the G323.18+0.15 complex, indicated by white circles in the corresponding upper panels. The vertical dashed black lines represent the systemic velocities of G323.18a (−67.25 km s⁻¹) and G323018b (−64.63 km s⁻¹).