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проба воздуха stresses
ecol.	air sample
med.	sample of air
OHS	testing the atmosphere (Tauro el toro)
пробы воздуха
math.	samples of air

проба воздуха: 82 phrases in 26 subjects

Astronautics	5
Aviation	1
Caspian	1
Construction	1
Ecology	6
Electronics	1
Energy industry	13
Facilities	1
Gas processing plants	1
Makarov	12
Medical	6
Medical appliances	1
Meteorology	1
Military	2
Mining	4
Natural resourses and wildlife conservation	8
Nautical	1
Navigation	1
Nuclear and fusion power	2
Occupational health & safety	3
Production	1
Security systems	1
Shipbuilding	1
Solar power	1
Technology	5
Weapons of mass destruction	2