HHSMT CO(3-2) spectra toward a few positions of HB 3. The unshocked, cold clouds are at V_LSR ∼ −43 km s⁻¹ (where LSR is the local standard of rest). The order of the spectrum is from west to east. “S” indicates the southern shell, and “B” indicates the boundary positions between the SNR HB 3 and the H II region W3 complex. The CO GRID spectra and H₂ images of some of these positions are shown in Figures 9 and 10, and are listed in Table 2. The bottom panel of “B1(0,−60)” indicates the offset in arcsec from B1 position. The Gaussian fit results are summarized in Table 5. Each spectrum shows a CO broad line with a range line widths of 7–21 km s⁻¹, and the preshock gas widths at 41–44 km s⁻¹. The central velocity of shocked gas is at −32, −43, and −47 km s⁻¹, S2, B2, and B1, respectively.