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| concentrazione volumica | |||
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| focalizzazione | |||
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| concentrazione | |||
| تركيز: 29 phrases in 11 subjects |
| Economy | 1 |
| Environment | 4 |
| Lighting other than cinema | 1 |
| Metrology | 4 |
| Physics | 2 |
| Radio | 6 |
| Radiology | 3 |
| Thermal Energy | 1 |
| Vacuum tubes | 5 |
| Video recording | 1 |
| Water resources | 1 |