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Terms for subject Technology containing method of direction observation | all forms | exact matches only | in specified order only
| English | Chinese |
| method of direction observation | 方向观测法 |
| method of direction observation in rounds | 全圆方向观测法 |
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| English | Chinese |
| method of direction observation | 方向观测法 |
| method of direction observation in rounds | 全圆方向观测法 |