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| 卷宗标志; 文件标志 | |||
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| 文件标志 | |||
| 文件标志［标记］ | |||
| 锉刀标 | |||
| 文件标记 | |||
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file marking : 6 phrases in 6 subjects |
| Electronics | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Telecommunications | 1 |
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