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closed system
gen.	sistema cerrado
labor.org.	sistema de recirculación

closed system: 41 phrases in 20 subjects

Agriculture	1
Chemistry	1
Communications	1
Computer numerical control	1
Drilling	1
Earth sciences	1
Electronics	4
Environment	1
Fishery fishing industry	1
Food industry	1
General	4
Information technology	2
Labor law	1
Measuring instruments	5
Mechanic engineering	10
Medical	2
Natural sciences	1
Pharmacy and pharmacology	1
Technology	1
Transport	1