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constant frequency stresses
el.	неизменная частота
tech.	постоянная частота; неизменная постоянная частота

constant frequency: 50 phrases in 20 subjects

Accounting	1
Acoustics	1
Antennas and waveguides	2
Astronautics	1
Aviation	1
Crystallography	1
Economy	2
Electrical engineering	4
Electronics	5
Energy industry	1
Geophysics	4
Makarov	1
Mass media	6
Mathematics	1
Metrology	2
Military	2
Nanotechnology	2
Physics	3
Technology	8
Telecommunications	2