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| 方向特征 | |||
| 定向特征 | |||
| 方位特性; 方向性图形; 方向特性 | |||
| directional characteristic: 7 phrases in 5 subjects |
| Electronics | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 3 |
| Telecommunications | 1 |
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