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Why create a secure coffins?
Several centuries ago, medicine had not sufficiently accurate methods for the fixation of death, and being lethargic or unconscious people often buried alive. For this reason, since the late 18th century in Europe became popular to bury their dead in coffins so-called safe. In the simplest case, the structure of the coffin included farmed out the breathing tube and bell cord from the fixed to the arm buried. Today, security coffins are used much less frequently, as death is recorded accurately almost always.
