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| main valve | |||
| main pilot valve | |||
| primary valve | |||
| основной клапан: 23 phrases in 12 subjects |
| Astronautics | 1 |
| Automobiles | 1 |
| Construction | 1 |
| Drilling | 1 |
| Energy industry | 2 |
| Military | 1 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oil and gas technology | 4 |
| Sakhalin | 1 |
| Technology | 8 |
| Tengiz | 1 |