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| acoustic measurement system | |||
| 声 测量 系统: 17 phrases in 9 subjects |
| Aviation | 2 |
| Earth sciences | 3 |
| Electronics | 4 |
| Geophysics | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
| Telecommunications | 2 |
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