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1区
el., sec.sys.	Zone 1
20区
el., sec.sys.	Zone 20
22区
el., sec.sys.	Zone 22
0区
el., sec.sys.	Zone f
2区
el., sec.sys.	Zone 2
21区
el., sec.sys.	Zone 21
区 ōu
stat.	Plot n

区: 376 phrases in 20 subjects

Automatic control	2
Automobiles	1
Computer networks	6
Construction	2
Electric machinery	1
Electronics	10
Environment	105
Horticulture	2
International Monetary Fund	86
Mathematics	96
Nuclear physics	14
Patents	5
Pest control	5
Piezoelectric crystals	3
Risk Management	1
Semiconductors	21
Statistics	9
Superconductivity	4
Thermal Energy	2
Welding	1