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| radiografia | |||
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| raios X | |||
| radiação X; raios de Röntgen | |||
| Angielski tezaurus | |||
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| Rontgen beam technology | |||
| Röntgen beam technology | |||
| X (phonetic alphabet) | |||
| Roentgen-ray; energetic high-frequency electromagnetic radiation | |||
| X | |||
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| very short wavelength | |||
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X- rays : 78 do fraz, 13 tematyki |
| Chemia | 2 |
| Elektronika | 1 |
| Kulturoznawstwo | 2 |
| Medycyna | 14 |
| Nauka o ziemi | 2 |
| Nauki przyrodnicze | 3 |
| Ochrona środowiska | 6 |
| Opieka zdrowotna | 5 |
| Pospolicie | 17 |
| Prawo pracy | 1 |
| Przemysł | 3 |
| Radiologia | 20 |
| Technika i technologia | 2 |