49909390 Additional devices of safety of passengers on back seats

Depending on a car complete set, are a part of additional devices of safety:
– the prednatyazhitel of seat belts who are built in inertial coils;
– limiters of effort of a tension of seat belts.
In case of frontal blow these devices can work both separately from each other, and at the same time.
Depending on force of frontal blow two options are possible:
– protection is provided only with seat belts;
– the prednatyazhitel works, densely pressing a seat belt to a body.
Prednatyazhiteli of seat belts of back seats work only at the included ignition.
At strong frontal blow the device instantly involves a belt, pressing it to a body and by that increasing overall performance of a belt.