  In any gauge model with spontaneous symmetry breakdown the gauge boson masses
and their mixings are not independent quantities. They are interconnected
through the vacuum expectation values (VEVs) of the Higgs sector. We discuss
the low-energy experiments, namely electron-hadron, neutrino-hadron and
neutrino-electron processes in the frame of the Manifest Left-Right Symmetric
model and show the impact of these dependencies on the possible heavy gauge
boson masses and mixings. At 90 % C.L., we obtain $M_{Z_2} \geq 1475$ GeV for
phenomenologically favorable models, without $W_L-W_R$ mixing and $M_{Z_2} \geq
1205$ GeV in the other extreme case when a maximal mixing is possible. If we
consider the \lr parameters without any constraints from the Higgs sector these
limits get down to 410 GeV. Bounds on the Z_2 mixing angle as well as the W_2
mass and its mixing angle are also given.
