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| 磁头缝隙 | |||
| 磁头空隙; 磁头间隙 | |||
| head gap: 15 phrases in 7 subjects |
| Electronics | 1 |
| Information technology | 1 |
| Metallurgy | 2 |
| Shipbuilding | 2 |
| Space | 2 |
| Technology | 4 |
| Telecommunications | 3 |
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