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| 观测井; 水文测量井 | |||
| 验潮井; 测水位井 | |||
| 自记水位仪井; 自记水位观察井; 量水井; 计量井; 水文观测井 | |||
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gauge well : 5 phrases in 3 subjects |
| Aviation | 1 |
| Oil / petroleum | 2 |
| Technology | 2 |
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