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| acoustic beam; acoustical beam; beam of sound | |||
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声波束 : 24 phrases in 10 subjects |
| Acoustics | 2 |
| Aviation | 4 |
| Earth sciences | 1 |
| Fishery fishing industry | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Piezoelectric crystals | 1 |
| Shipbuilding | 1 |
| Technology | 8 |
| United Nations | 3 |
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