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| 自由水面; 自由水面线 | |||
| 测压管水头线 | |||
| 测压线 | |||
| 测压管水位线; 自由水面坡线; 水压坡降线; 水力坡降线 | |||
| piezometric line: 4 phrases in 1 subject |
| Technology | 4 |
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