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X-rays : 179 phrases in 21 subjects |
| Astronautics | 2 |
| Aviation | 7 |
| Chemistry | 26 |
| Construction | 1 |
| Dentistry | 2 |
| Ecology | 2 |
| Economics | 6 |
| General | 17 |
| Immunology | 1 |
| Law | 2 |
| Medical | 14 |
| Metallurgy | 25 |
| Microelectronics | 41 |
| Military | 3 |
| Oil / petroleum | 1 |
| Oil and gas | 22 |
| Orthopedics | 1 |
| Pharmacy and pharmacology | 1 |
| Physics | 1 |
| Spectroscopy | 1 |
| Technology | 3 |