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| 正交坐标 | |||
| 直角坐标 | |||
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| 垂直坐标; 正交坐标; 直角坐标 | |||
| 垂直〔直角，正交〕坐标 | |||
| orthogonal coordinates: 12 phrases in 5 subjects |
| Bridge construction | 2 |
| Compressors | 1 |
| Engineering geology | 1 |
| Space | 2 |
| Technology | 6 |
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