  We consider $SU(3)_{C}\times SU(2)_{AL}\times SU(2)_{BL}\times U(1)_{Y}$ as
the low-energy subgroup of supersymmetric $SU(3)^{6}$ unification. This may
imply small deviations from quark-lepton universality at the TeV scale, as
allowed by neutron-decay data. New particles are predicted with specific
properties. We discuss in particular the new heavy gauge bosons corresponding
to $SU(2)_{AL} \times SU(2)_{BL} \to SU(2)_L$.
