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Replacement

  1. Replacement (a synonym percolation) – one of ways of extraction of plant material for production of liquid extracts and tinctures by which the taking liquid at process course continuously is updated;
  2. Replacement in psychoanalysis – the protective mental mechanism which allows to remove unacceptable instinctive aspirations, thoughts and representations from consciousness.
 
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The first vibrator was invented in the 19th century. It worked at the steam engine and intended for treatment of female hysteria.