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| 描述性调查 | |||
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badanie : 127 phrases in 13 subjects |
| Ecology | 1 |
| Electric machinery | 16 |
| Electric motors | 5 |
| Electronics | 3 |
| Environment | 36 |
| Isolation | 1 |
| Mathematics | 30 |
| Patents | 1 |
| Power system protection | 1 |
| Reliability | 23 |
| Statistics | 4 |
| Superconductivity | 2 |
| Welding | 4 |