All

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 H01 Natural Sciences D010811 +
  H01.671 Physics D010825 +
   H01.671.252 Electricity D004560 +
    H01.671.252.780 Power Plants D011210 
 J01 Technology, Industry, and Agriculture D013676 +
  J01.780 Power Plants D011210 
    J01.780.600 Nuclear Reactors D009688