@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://www.irandoc.acir/onto/irandoc/CAB0004179>
  skos:prefLabel "صاف‌کردن زیست‌شناختی"@fa, "biological filtration"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/CAB0004178> .

<http://www.irandoc.acir/onto/irandoc/CAB0004178>
  skos:broader <http://www.irandoc.acir/onto/irandoc/CAB0004179> ;
  skos:prefLabel "سیستم فیلم ثابت زیستی"@fa, "biological fixed-film systems"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .