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| optinen hyötysuhde | |||
| efficienza: 56 phrases in 15 subjects |
| Communications | 1 |
| Economy | 2 |
| Electronics | 2 |
| Energy industry | 19 |
| Environment | 2 |
| Finances | 5 |
| General | 1 |
| Health care | 1 |
| Law | 1 |
| Pharmacy and pharmacology | 1 |
| Politics | 1 |
| Scientific | 1 |
| Social science | 1 |
| Statistics | 17 |
| United Nations | 1 |