Position-velocity diagram along PA = 21° of ¹²CO (J = 3–2) (top; HPBW= 0.′′31 × 0.′′24) and ¹³CO (J = 3–2) (bottom; HPBW = 0.′′33 × 0.′′26). show the fullspatial and V_LSR range where CO emission is detected, whereas the right panel offers a closer view of the central regions (i.e. the large-hg). Level spacing is: ¹³CO) 1σ, 3σ, 5σ, 10σ... by 10σ (σ = 7 and 5 mJy/beam, in the left and right panels, respectively); ¹²CO) 1σ, 3σ, 5σ, 10σ... by 10σ (σ = 6 and 4 mJy/beam, in the left and right panels, respectively). The dashed lines indicate the overall velocity gradient along the symmetry axis of the large-scale outflow (purple) and along the equator of the mini-hg (white).