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| electric valve: 29 phrases in 13 subjects |
| Automated equipment | 4 |
| Automobiles | 1 |
| Construction | 1 |
| Electronics | 1 |
| Machine components | 1 |
| Natural resourses and wildlife conservation | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 3 |
| Oilfields | 1 |
| Refrigeration | 1 |
| Technology | 12 |
| Thermal engineering | 1 |
| Transport | 1 |