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 102
Structure
Hierarchy
Section: C - Mining and quarrying
Divsion:
10
- Mining of coal and lignite; extraction of peat
Group: 102 - Mining and agglomeration of lignite
Class
1020
- Mining and agglomeration of lignite
Links
NIC@MOSPI