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التردد n
el.gen.	Netzfrequenz f

التردد: 148 phrases in 21 subjects

Antennas and waveguides	2
Automatic control	8
Electric machinery	2
Electric motors	4
Electric traction	7
Electricity generation	4
Electronics	27
Lighting other than cinema	1
Mathematics	5
Piezoelectric crystals	30
Power lines	7
Radio	30
Radiobiology	1
Satellite communications	1
Semiconductors	1
Sound recording	3
Telecommunications	1
Telegraphy	3
Thermal Energy	3
Transformers	1
Vacuum tubes	7