  We show that the Dirac equation can be rewritten as a relation describing the
fundamental symmetry group of special topological manifold corresponding to the
Dirac wave field. It leads to unification of the time-space and internal
symmetries within one symmetry group. We suppose that nonelectromagnetic
interactions appear within such approach as the deviations of the metrics from
the euclidian form. The expression for the long-range part of "effective"
nucleon-nucleon potential is derived using this assumption.
