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primary frequency
commun., transp., avia.	Hauptfrequenz f
phys.	Fundamentalfrequenz f; Grundfrequenz f
tech.	Primärfrequenz f
English thesaurus
primary frequency
avia., Canada	The radiotelephony frequency assigned to an aircraft as a first choice for air-ground communication in a radiotelephony network

primary frequency: 3 phrases in 2 subjects

Communications	2
Technology	1