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| طيفي | |||
| تركيز + طيفى لـ ؛الكثافة الطيفية | |||
| espectral: 76 phrases in 12 subjects |
| Antennas and waveguides | 9 |
| Electronics | 9 |
| Environment | 1 |
| International Monetary Fund | 1 |
| Lighting other than cinema | 29 |
| Mathematics | 5 |
| Metrology | 3 |
| Piezoelectric crystals | 5 |
| Radio | 2 |
| Radiology | 1 |
| Statistics | 4 |
| Vacuum tubes | 7 |