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| 水文测验断面 | |||
| 水力测量截面; 水文观测断面; 水文断面图; 测流断面 | |||
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| 水文测验断面 | |||
| 水文观测断面; 水文断面图; 测流断面 | |||
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hydrometric section : 1 phrase in 1 subject |
| Technology | 1 |
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