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widmowy | |||
gęstość widmowa; natężenie widmowe |
espectral : 91 phrases in 12 subjects |
Antennas and waveguides | 18 |
Communications | 1 |
Electronics | 10 |
Environment | 1 |
Lighting other than cinema | 31 |
Mathematics | 11 |
Metrology | 3 |
Piezoelectric crystals | 5 |
Radio | 2 |
Radiology | 1 |
Transport | 1 |
Vacuum tubes | 7 |