  The observational behavior of spherically symmetric inhomogeneous
cosmological models is studied, which consist of inner and outer homogeneous
regions connected by a shell or an intermediate self-similar region. It is
assumed that the present matter density parameter in the inner region is
smaller than that in the outer region, and the present Hubble parameter in the
inner region is larger than that in the outer region. Then galaxies in the
inner void-like region can be seen to have a bulk motion relative to matter in
the outer region, when we observe them at a point O deviated from the center C
of the inner region. Their velocity $v_p$ in the CD direction is equal to the
difference of two Hubble parameters multiplied by the distance between C and O.
It is found also that the velocity $v_d$ corresponding to CMB dipole anisotropy
observed at O is by a factor $\approx 10$ small compared with $v_p$. This
behavior of $v_d$ and $v_p$ may explain the puzzling situation of the cosmic
flow of cluster galaxies, when the radius of the inner region and the distance
CD are about 200 $h^{-1}$ Mpc and 40 $h^{-1}$ Mpc, respectively ($H_0 = 100
h^{-1} km/sec Mpc^{-1}$), and when the gaps of density and Hubble parameters
are $\approx 0.5$ and 18%, respectively.
