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генератор эталонной частоты stresses
el.	standard-frequency generator
генератор эталонных частот
astronaut.	standard frequency generator
metrol.	calibrated oscillator; frequency-calibrated oscillator; standard frequency oscillator; standard oscillator

генератор эталонной частоты: 14 phrases in 4 subjects

Astronautics	1
Mass media	1
Metrology	10
Technology	2