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| 保密数据 | |||
| 美国的未解密的涉密资料 | |||
| 不公开数据 | |||
| 保密资料; 内部保密资料 | |||
| 内部资料 | |||
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restricted data : 3 phrases in 2 subjects |
| Aviation | 1 |
| Electronics | 2 |
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