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| 压力干管 | |||
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pressure main : 29 phrases in 10 subjects |
| Architecture | 1 |
| Automobiles | 5 |
| Aviation | 1 |
| Electronics | 4 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 5 |
| Nautical | 1 |
| Plastics | 2 |
| Technology | 8 |
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