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| directive coefficient | |||
| directive factor; directivity factor | |||
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定向系数 : 17 phrases in 8 subjects |
| Aviation | 1 |
| Bridge construction | 4 |
| Earth sciences | 1 |
| Electronics | 3 |
| Engineering geology | 1 |
| Space | 1 |
| Technology | 5 |
| Wood processing | 1 |
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