慶應義塾大学 商学部・商学研究科

新保一成 研究室

開発と環境の経済分析...

NIC 1998 - code 13

Structure

Hierarchy

  • Section: C - Mining and quarrying
  • Divsion: 13 - Mining of metal ores

Group

  • 131 - Mining of iron ores
  • 132 - Mining of non-ferrous metal ores, except uranium and thorium ores

Division note

  • This Division includes the extraction of metal ores, the term "ores" being applied to metalliferrous minerals associated with the substance in which they occur and with which they are extracted from the mine. Preparation of ores, most important by "concentration", for further metallurgical operations.

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