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无缝 管 : 173 phrases in 21 subjects |
| Automobiles | 3 |
| Bridge construction | 1 |
| Business | 1 |
| Chemistry | 1 |
| Drilling | 2 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 4 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Mechanics | 3 |
| Metallurgy | 70 |
| Nautical | 5 |
| Oil / petroleum | 3 |
| Rail transport | 1 |
| Refrigeration | 2 |
| Shipbuilding | 2 |
| Steel production | 4 |
| Technology | 60 |
| Textile industry | 4 |
| Wind Energy | 2 |
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