Relative distribution of radio emission and column density with respect to the radio peaks for G346.056−0.021 and G346.077−0.056 along the projections shown in the column density map in Fig. 9. Zero on the x-axis corresponds to the position of the radio peaks increasing towards the direction of the tail (south-west for G346.056−0.021 and east for G346.077−0.056). The radio flux densities plotted are normalized to the peak flux densities and the column density is given in terms of 10²² cm ⁻².