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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) | |||
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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 | |||
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声波回声测深法 |
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 |