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

<http://www.irandoc.acir/onto/irandoc/INSP0015068>
  skos:prefLabel "فولاد"@fa, "steel"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/INSP0015060> .

<http://www.irandoc.acir/onto/irandoc/INSP0015057>
  skos:prefLabel "فولاد پرکربن"@fa, "high carbon steel"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/INSP0015060> .

<http://www.irandoc.acir/onto/irandoc/INSP0015058>
  skos:prefLabel "فولاد کم‌کربن"@fa, "low carbon steel"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/INSP0015060> .

<http://www.irandoc.acir/onto/irandoc/INSP0015060>
  skos:altLabel "mild steel"@en ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/INSP0015059>, <http://www.irandoc.acir/onto/irandoc/INSP0015058>, <http://www.irandoc.acir/onto/irandoc/INSP0015057> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/INSP0015068> ;
  skos:prefLabel "فولاد کربنی"@fa, "carbon steel"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/INSP0015059>
  skos:prefLabel "فولاد میان‌کربن"@fa, "medium carbon steel"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/INSP0015060> .