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    SECTION E : ELECTRICITY, GAS, STEAM AND AIRCONDITION SUPPLY
    Division 37 : Sewerage
    GroupClassSub-classDescription
    370  Sewerage
     3700 Sewerage
      37001The operation and maintenance of sewer systems
      37002Collecting and transporting of human or industrial waste water or rain water by means of sewerage networks, collectors, tanks and other means of transport (sewage vehicles etc.)
      37003Treatment of waste water or sewer by means of physical, chemical or biological processes
     
         
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