 |
| |||
| 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 |