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| acoustic emission | |||
| 声波发 射: 18 phrases in 8 subjects |
| Earth sciences | 2 |
| Engineering geology | 3 |
| General | 1 |
| Geophysics | 2 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 2 |
| Technology | 6 |
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