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| authentication technology | |||
| verification technique | |||
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验证 技 术 : 34 phrases in 8 subjects |
| Air defense | 3 |
| Aviation | 17 |
| Business | 2 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Space | 6 |
| Technology | 2 |
| United States | 2 |
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