using the ATLASGAL 870 $\mu$m dust continuum map. Figure \[fig1\]a also indicates an area ($\sim$0$\degr$.4 $\times$ 0$\degr$.4) by a broken box, which was studied by @kohno18. The locations of W33 A (G012.90$-$0.24, G012.90$-$0.26), W33 B (G012.68$-$0.18), and W33 Main (G012.81$-$0.19) are also marked by filled circles in Figure \[fig1\]a. In Figure \[fig1\]a, the positions of 88 ATLASGAL clumps at 870 $\mu$m [from @urquhart18] are also marked by diamonds. @urquhart18 obtained velocities toward the ATLASGAL clumps and also tried to compute the distance information for the clumps. All these ATLASGAL clumps are depicted in a velocity range of \[30, 56\] km s$^{-1}$, and are located at a distance of $\sim$2.6 kpc [@urquhart18], which are in agreement with the previously published results [e.g., @immer13; @kohno18]. In this paper, we have adopted a distance of $\sim$2.6 kpc to the entire selected area around the W33 complex for all the analysis.

One can also notice that the ATLASGAL survey has allowed us to trace the boundary of an extended physical system hosting the W33 complex (area $\sim$50 pc $\times$ 37 pc; distance $\sim$2.6 kpc; see Figure \[fig1\]a). However, we do not find any study related to unearth the physical conditions and the kinematics of 