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концентрация O2
 концентрация CO₂
nat.res. carbon dioxide concentration; CO₂ concentration; carbon dioxide content
| во
 Во
prop.name Waugh
 во
gen. within; at; in; to; into; for
| вдыхаемом воздухе
 вдыхать воздух
Makarov. imbibe air

to phrases
концентрация CO₂stresses
nat.res. carbon dioxide concentration; CO₂ concentration (in the soil air); carbon dioxide content (in the soil air)
концентрация O2: 9 phrases in 4 subjects
Drilling1
Makarov1
Medical6
Medical appliances1