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air space
gen.	Luftraum m (Luftfahrt; auch bei Isolierglas); Luftspiel n (bei Kupplung); Luftzwischenraum m
agric.	Luftkammer f
biol.	Luftkammer f (in egg, im Ei)
construct.	Luftschicht f; Luftspalt m; leere Zwischenschicht
econ.	Luftraum m
lab.law., el., construct.	Mindestluftraum m
nat.res.	luftgefüllter Porenraum (of soil); Luftgehalt m (of soil); Luftvolumen n (of soil)

air space: 45 phrases in 15 subjects

Accounting	1
Agriculture	2
Astronautics	1
Aviation	1
Construction	7
Criminal law	1
Economy	3
General	9
Life sciences	1
Measuring instruments	1
Mining	1
Natural resourses and wildlife conservation	1
Natural sciences	2
Technology	11
Transport	3