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sub-harmónica
math.	componente subarmonica
scient., el.	armonica di ordine inferiore; armonica inferiore; sub-armonica m
sub-harmónico
IT, el.	subarmonica m
scient., el.	sub-armonica m; armonica di ordine inferiore; armonica inferiore

sub-harmónica: 4 phrases in 3 subjects

Electronics	1
Mathematics	2
Power electronics	1