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Terms for subject Hydroelectric power stations containing first order triangulation | all forms | exact matches only | in specified order only
| English | Chinese |
| first order triangulation | 一等三角测量 |
| first order primary triangulation survey | 一等三角测量 |
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| English | Chinese |
| first order triangulation | 一等三角测量 |
| first order primary triangulation survey | 一等三角测量 |