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回声测距〔定位〕; 回波测距法 | |||
回声测距; 回声探鱼; 回声定位 | |||
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回声测距法; 回声范围; 回声距离 | |||
回声波测距法 | |||
回声测距【定位】 | |||
回波测距; 回声测距; 回声定位 | |||
回声测距 (法) |
echo-ranging: 31 phrases in 10 subjects |
Air defense | 1 |
Aviation | 2 |
Earth sciences | 3 |
Electronics | 3 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 1 |
Geophysics | 4 |
Navigation | 2 |
Oil / petroleum | 3 |
Technology | 11 |