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输气 管 : 107 phrases in 19 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Aviation | 3 |
| Company name | 4 |
| Consulting | 1 |
| Drilling | 3 |
| Economy | 1 |
| General | 4 |
| Hydroelectric power stations | 2 |
| Metallurgy | 2 |
| Nursing | 3 |
| Oil / petroleum | 22 |
| Racing and motorsport | 1 |
| Refrigeration | 1 |
| Reproductive biology | 5 |
| Steel production | 1 |
| Surgery | 2 |
| Technology | 48 |
| Telecommunications | 1 |
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