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| 压力管线 | |||
| 压力管道 | |||
| 压力管渠; 加压管路; 耐压管线 | |||
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pressure pipeline : 22 phrases in 5 subjects |
| Communications | 1 |
| Hydroelectric power stations | 6 |
| Metallurgy | 2 |
| Technology | 11 |
| Water resources | 2 |
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