  A classification of elementary particles with respect to C-operation admits
the existence of truly neutral types of fermions. Among them one can find both
a Dirac and a Majorana neutrinos of an electroweak nature. Their mass includes
the electric and weak parts, in the presence of which a neutrino has the
anapole charge, charge radius and electric dipole moment. They constitute the
paraneutrino of true neutrality, for example, at the neutrino interaction with
a spinless nucleus of an axial-vector current. We derive the united equations
which relate the structural components of mass to anapole, charge radius and
electric dipole of each truly neutral neutrino at the level of flavour
symmetry. Such a principle can explain the C-noninvariant nature of neutrinos
and fields in the framework of constancy law of the size implied from the
multiplication of a weak mass of the C-odd neutrino by its electric mass. From
this point of view, all neutrinos of C-antisymmetricality regardless of the
difference in masses of an axial-vector character, possess the same anapole
with his radius as well as the identical electric dipole. Their analysis
together with earlier measurements of an electric dipole moment of neutrino
gives the right to accept not only the existence of truly neutral types of
Dirac neutrinos and fields but also the availability of mass structure in them
as the one of experimentally established facts.
