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PAM-FM stresses
Gruzovik	амплитудно-импульсная частотная модуляция
Gruzovik, radio	амплитудно-импульсная частотная модуляция (pulse-amplitude-modulation frequency modulation)
English thesaurus
PAM-FM
abbr., earth.sc.	pulse amplitude modulation-frequency modulation
tech.	pulse-amplitude modulation, frequency modulation
PAM/FM
abbr., mil., avia.	pulse amplitude modulation; pulse frequency modulation