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| gang of wells; multiple wells; well cluster | |||
| battery of wells; well group; group of wells; multiple well system | |||
| row of wells; well field | |||
| 井群: 21 phrases in 4 subjects |
| Engineering geology | 6 |
| Hydroelectric power stations | 3 |
| Oil / petroleum | 1 |
| Technology | 11 |
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