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воздухонепроницаемость n stresses
agrochem.	air permeability
cem.	air-tight
construct.	tightness to air; air tightness; air-tightness
Makarov.	resistance to air passage; resistance to air penetration; resistance to air permeability
O&G, tengiz.	building air tightness (Yeldar Azanbayev)
pulp.n.paper	air resistance
tech.	air impermeability; airtightness
textile	air-retention capacity

воздухонепроницаемость: 4 phrases in 3 subjects

Automobiles	1
Pulp and paper industry	1
Technology	2