| |||
echo sounding | |||
acoustic minesweeping | |||
echo-sounding; reflection sounding | |||
acoustic sounding; acoustical sounding; echo location; exploration by echoes (法) | |||
| |||
reflection sounding | |||
| |||
echosounding | |||
| |||
echo sounding |
回 声探测 : 46 phrases in 20 subjects |
Agriculture | 1 |
Air defense | 1 |
Architecture | 3 |
Aviation | 1 |
Construction | 1 |
Earth sciences | 1 |
Electronics | 6 |
Engineering geology | 3 |
Exhibitions | 2 |
Fish farming pisciculture | 1 |
Fishery fishing industry | 2 |
General | 4 |
Geophysics | 1 |
Metallurgy | 1 |
Mining | 1 |
Oil / petroleum | 4 |
Shipbuilding | 2 |
Space | 1 |
Technology | 9 |
Telecommunications | 1 |