CO (6−5) low-velocity channel maps in L1448-mm/IRS3 region. Contours spacing is 2σ, with the first contour at 3σ (σ = 0.62 K km s^-1). The plus symbol and crosses represent the continuum sources as in Fig. 3. The arrows indicate the clumps that are traced only at low velocities (positions reported in Table 3).