  The rules of calculating three undetermined functions which defined a
solution in the LTB model are used to study the class of exact nonhomogene\-ous
models with $f^2(\mu) = 1$, $\Lambda = 0$. The parameter $\nu(\mu)$ defined the
difference between LTB and FRW models is found out and the limit transformation
to the FRW model is shown. The initial conditions are present throught density
and Habble function at the moment of time $\tau = 0$. Two criteria of
homogeneous of matter distribution are studied. The asimptotic of the present
solution for $\tau \rightarrow +\infty$ is studied.
