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Protection : 605 phrases in 53 subjects |
| Agriculture | 5 |
| Animal husbandry | 11 |
| Antennas and waveguides | 2 |
| Biology | 2 |
| Biotechnology | 1 |
| Cables and cable production | 1 |
| Commerce | 7 |
| Construction | 1 |
| Corporate governance | 3 |
| Ecology | 1 |
| Economics | 12 |
| Electric machinery | 20 |
| Electric traction | 2 |
| Electrical engineering | 6 |
| Electricity generation | 9 |
| Electronics | 80 |
| Environment | 73 |
| Fish farming pisciculture | 1 |
| Fishery fishing industry | 1 |
| Food industry | 2 |
| Forestry | 19 |
| Health care | 2 |
| Horticulture | 7 |
| Insurance | 1 |
| International Monetary Fund | 30 |
| Isolation | 17 |
| Law | 4 |
| Lighting other than cinema | 2 |
| Mathematics | 3 |
| Microsoft | 27 |
| Name of organization | 60 |
| Nuclear physics | 3 |
| Pest control | 5 |
| Politics | 2 |
| Power lines | 3 |
| Radio | 10 |
| Radiology | 4 |
| Rail transport | 7 |
| Security systems | 1 |
| Socialism | 4 |
| Sociology | 4 |
| Soil science | 3 |
| Statistics | 1 |
| Technology | 3 |
| Telegraphy | 1 |
| Thermal Energy | 1 |
| Transformers | 3 |
| United Nations | 119 |
| Vacuum tubes | 1 |
| Water resources | 6 |
| Welding | 2 |
| Welfare & Social Security | 9 |
| Wind Energy | 1 |