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| gas pipeline A long pipe, especially underground, used to transport gas over long distances (长管道，尤其是地下，用于长途运输天然气。) | |||
| piping for natural gas | |||
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天然 气管 道 : 15 phrases in 4 subjects |
| Company name | 7 |
| Environment | 1 |
| Mining | 1 |
| Oil / petroleum | 6 |
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