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Eigenfrequenz f
gen.	natural frequency; eigenfrequency; resonant frequency
astronaut., transp.	natural frequency of structural component
CNC, amer.	undamped frequency
commun.	ionosonde; vertical-incidence ionospheric recorder
commun., el.	characteristic frequency
construct.	free oscillation frequency
el.	inherent frequency
med.appl.	fundamental frequency
nucl.phys.	eigen frequency
phys.	free-running frequency (of the oscillator); self-frequency
tech.	nominal frequency

Eigenfrequenz: 9 phrases in 4 subjects

Electronics	6
General	1
Measuring instruments	1
Transport	1