#electrical_converter  converter that converts alternating current into direct current or vice versa
  supertype:  #converter__convertor  a device for changing one substance or form or state into another
  subtype:  #inverter  an electrical converter that converts direct current into alternating current
  subtype:  #power_pack__powerpack  a device for converting a power supply to a voltage required by particular equipment
  subtype:  #synchronous_converter__synchronousconverter__rotary__rotary_converter  electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa

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