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http://ja.wcontology.org/resource/Category:浄化槽 ( describe )
- http://wcontology.org/core#narrower ( describe )
  - http://ja.wcontology.org/resource/Category:排水設備
http://ja.wcontology.org/resource/Category:下水道 ( describe )
- http://wcontology.org/core#narrower ( describe )
  - http://ja.wcontology.org/resource/Category:排水設備
http://ja.wcontology.org/resource/Category:排水設備 ( describe )
- http://www.w3.org/2002/07/owl#sameAs ( describe )
  - http://ja.dbpedia.org/resource/Category:排水設備
- http://www.w3.org/1992/02/22-rdf-syntax-ns#type ( describe )
  - http://wcontology.org/core#topicCategory
- http://wcontology.org/core#narrower ( describe )
  - http://ja.wcontology.org/resource/Category:水質汚染
  - http://ja.wcontology.org/resource/Category:管工事
  - http://ja.wcontology.org/resource/Category:設備
  - http://ja.wcontology.org/resource/Category:建築環境工学
  - http://ja.wcontology.org/resource/Category:衛生
  - http://ja.wcontology.org/resource/Category:建築設備
- http://www.w3.org/ns/prov#wasDerivedFrom ( describe )
  - http://ja.wikipedia.org/wiki/Category:排水設備?oldid=63414487