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

<http://www.irandoc.acir/onto/irandoc/NEMA0001642>
  skos:prefLabel "گریس‌ها"@fa, "greases"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0001640> .

<http://www.irandoc.acir/onto/irandoc/NEMA0001689>
  skos:prefLabel "روغن‌های روان‌ساز"@fa, "lubricating oils"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0001640> .

<http://www.irandoc.acir/onto/irandoc/NEMA0001640>
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0001642>, <http://www.irandoc.acir/onto/irandoc/NEMA0008712>, <http://www.irandoc.acir/onto/irandoc/NEMA0001689> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/NEMA0001643> ;
  skos:prefLabel "روان‌کننده‌های جامد"@fa, "solid lubricants"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/NEMA0008712>
  skos:prefLabel "گرافیت‌ها"@fa, "graphites"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/NEMA0001640> .

<http://www.irandoc.acir/onto/irandoc/NEMA0001643>
  skos:prefLabel "روان‌کننده‌ها"@fa, "lubricants"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/NEMA0001640> .