#charge_unit__quantity_unit  a measure of the quantity of electricity (determined by the amount of an electric current and the time for which it flows)
  supertype:  electromagnetic_unit__electromagneticunit__emu  any of various systems of units for measuring electricity and magnetism
  subtype:  coulomb__c__ampere-second  a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second
  subtype:  abcoulomb  a unit of electrical charge equal to 10 coulombs
  subtype:  ampere-minute  a unit of charge equal to 60 coulombs
  subtype:  ampere-hour  a unit of charge equal to 3600 coulombs

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