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noun | verb | to phrases
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| 铅垂线 | |||
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| 用铅垂线测量; 用铅垂线检査…的垂直度; 探测; 检查 | |||
| plumbline: 2 phrases in 2 subjects |
| Earth sciences | 1 |
| Hydroelectric power stations | 1 |
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