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防止 器 : 32 phrases in 13 subjects |
| Architecture | 1 |
| Automobiles | 1 |
| Economy | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| General | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 5 |
| Plastics | 1 |
| Project management | 1 |
| Technology | 15 |
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