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air natural stresses
el.	естественное охлаждение воздухом (cooled)
oil	с естественным воздушным охлаждением

air natural: 44 phrases in 18 subjects

Caspian	2
Cement	1
Construction	2
Ecology	2
Electrical engineering	5
Electricity	1
Electronics	4
Energy industry	3
Environment	1
General	2
Makarov	1
Metallurgy	2
Oil / petroleum	5
Polymers	1
Refrigeration	1
Solar power	1
Technology	9
Weapons of mass destruction	1