(a)–(d) Velocity-integrated maps of CO J = 1–0, ¹³CO J = 1–0, C¹⁸O J = 1–0, and CO J = 3–2, respectively. The maps are centered at the high-R_3–2/1–0 spot T3 (table 1) The velocity range for integration is −190 to −90 km s⁻¹. (e) Longitude–velocity map of CO J = 3–2 emission integrated over the latitudes of the V-integrated maps. The lower and upper bounds of the color scale are shown in the bottom left of each panel. (Color online)