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

<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 "Carbon steel"@en, "فولاد کربنی"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/insp0015059>
  skos:prefLabel "Medium carbon steel"@en, "فولاد میان‌کربن"@fa ;
  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/insp0015068>
  skos:prefLabel "Steel"@en, "فولاد"@fa ;
  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 "High carbon steel"@en, "فولاد پرکربن"@fa ;
  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 "Low carbon steel"@en, "فولاد کم‌کربن"@fa ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/insp0015060> .