Spectra of the CO (2−1) line towards the entire W43-MM2 and W43-MM3 regions (a and c) and towards bright outflows (b and d). The systemic velocities, V_LSR = 91 km s⁻¹ and V_LSR = 93 km s⁻¹ for W43-MM2 and W43-MM3, respectively, are measured with the DCN(3-2) line (Cunningham et al. 2023) and are indicated by black dashed lines in (a) and (c). The limits of the high- and low-velocity intervals are indicated by blue and red dotted lines in (b) and (d).