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| straight pipeline | |||
| straight run pipe | |||
| 直管道: 24 phrases in 8 subjects |
| Automobiles | 1 |
| Electronics | 2 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Rail transport | 3 |
| Technology | 12 |
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