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| air valve: 99 phrases in 15 subjects |
| Automobiles | 3 |
| Chemistry | 3 |
| Construction | 5 |
| Earth sciences | 3 |
| General | 20 |
| Information technology | 2 |
| Materials science | 3 |
| Measuring instruments | 1 |
| Mechanic engineering | 21 |
| Medical appliances | 2 |
| Metallurgy | 4 |
| Physics | 1 |
| Sample preparation | 1 |
| Technology | 7 |
| Transport | 23 |