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| 顶部长度; 坎顶长度 | |||
| 坝顶长度 | |||
| 堰顶长度; 坝、堰的顶长; 顶部宽度; 顶部长度 (堤坝等); 波峰长度 | |||
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crest length : 9 phrases in 3 subjects |
| Engineering geology | 2 |
| Hydroelectric power stations | 3 |
| Technology | 4 |
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