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level tank : 50 phrases in 11 subjects |
| Architecture | 1 |
| Automobiles | 3 |
| Aviation | 3 |
| Drilling | 4 |
| Electronics | 3 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Metallurgy | 3 |
| Nautical | 3 |
| Oil / petroleum | 7 |
| Technology | 20 |
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