慶應義塾大学 商学部・商学研究科
新保一成 研究室
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Features
NIC 1998 - code 12
Structure
Hierarchy
Section: C - Mining and quarrying
Divsion: 12 - Mining of uranium and thorium ores
Group
120
- Mining of uranium and thorium ores(e.g. pitchblende), including concentrating of such ores
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