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underground canal | |||
underdrain | |||
conduit | |||
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underground ducting | |||
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subterranean channels (в породе) |
подземный канал: 20 phrases in 12 subjects |
Agrochemistry | 1 |
Construction | 4 |
Energy industry | 1 |
Engineering geology | 3 |
Gas processing plants | 4 |
General | 1 |
Hydrology | 1 |
Makarov | 1 |
Mass media | 1 |
Military | 1 |
Rail transport | 1 |
Technology | 1 |