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ray tube : 168 phrases in 19 subjects |
| Agriculture | 2 |
| Air defense | 6 |
| Aviation | 5 |
| Business | 3 |
| Earth sciences | 7 |
| Electronics | 34 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Fishery fishing industry | 1 |
| General | 10 |
| Geophysics | 3 |
| Information technology | 3 |
| Metallurgy | 17 |
| Nautical | 1 |
| Oil / petroleum | 3 |
| Plastics | 1 |
| Space | 16 |
| Technology | 51 |
| Telecommunications | 3 |
| Wind Energy | 1 |
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