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| |||
| 高射炮火，的; 防空炮火的 | |||
| 高射［防空］炮火 (的) | |||
| ack-ack: 22 phrases in 8 subjects |
| Aviation | 4 |
| Computer networks | 3 |
| General | 2 |
| Information technology | 2 |
| Metallurgy | 1 |
| Space | 3 |
| Technology | 1 |
| Telecommunications | 6 |
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