 |
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| 声波测探 | |||
| 声学探测 (测深、测距) | |||
| 声学探测; 声波测深 (法); 射波测深法; 回声探测; 回声测深 (法) | |||
| |||
| 声波测探 | |||
| 回声测深 | |||
| 声波测深法 | |||
| 射波探测法; 声波探测法 | |||
| 声波测深; 声学探测 | |||
| 声探测 | |||
| 声波测深 (法); 射波测深法; 回声探测; 回声测深 (法) | |||
| 声波探测 | |||
| |||
| 声波回声测深法 | |||
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acoustical sounding : 19 phrases in 8 subjects |
| Air defense | 1 |
| Earth sciences | 2 |
| Electronics | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 3 |
| Space | 1 |
| Technology | 8 |
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