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Air/Ground communication
Apollo-Soyuz, abbr.	A/G
Air-Ground communication [ɛə ˈgraund kə,mju:nɪ'keɪʃ(ə)n]
Apollo-Soyuz, abbr.	AG
air-ground communication [ɛə ˈgraund kə,mju:nɪ'keɪʃ(ə)n]
avia., Canada	Two-way communication between aircraft and stations or locations on the surface of the earth

Air: 32 phrases in 6 subjects

Abbreviation	21
Meteorology	1
Military	6
Non-governmental organizations	1
Trademark	1
Transport	2