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air cleaning
environ.	Luftreinigung f
sampl.	Luftsetzen n

air cleaning: 30 phrases in 13 subjects

Agriculture	3
Agronomy	3
American usage, not spelling	1
Automobiles	2
Chemistry	2
Construction	3
Environment	4
General	1
Mechanic engineering	1
Microelectronics	1
Natural resourses and wildlife conservation	3
Nuclear physics	4
Technology	2