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井口 : 222 phrases in 22 subjects |
| Agriculture | 1 |
| Botany | 1 |
| Construction | 2 |
| Drilling | 28 |
| Electronics | 5 |
| General | 59 |
| Geology | 4 |
| Historical | 3 |
| Hydrology | 1 |
| International Monetary Fund | 1 |
| Mineralogy | 1 |
| Mining | 10 |
| Missiles | 2 |
| Nautical | 3 |
| Oil / petroleum | 19 |
| Oil and gas | 8 |
| Oil and gas technology | 1 |
| Oilfields | 50 |
| Production | 1 |
| Sakhalin | 2 |
| Technology | 19 |
| Water supply | 1 |
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