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double frequency

stresses
telecom. двухчастотный; двойная частота
double-frequency [ˌdʌbl'friːkwənsi]
el. двухчастотный
doubled frequency
Makarov. удвоенная частота
double frequency shift
: 4 phrases in 4 subjects
Makarov1
Mass media1
Technology1
Telecommunications1