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| acoustic sounder; echo sounder | |||
| echo-machine | |||
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回声仪 : 160 phrases in 23 subjects |
| Acoustics | 1 |
| Architecture | 3 |
| Automobiles | 1 |
| Business | 1 |
| Construction | 4 |
| Earth sciences | 8 |
| Electronics | 5 |
| Engineering geology | 7 |
| Exhibitions | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Fish farming pisciculture | 1 |
| Fishery fishing industry | 1 |
| General | 4 |
| Geophysics | 1 |
| Hydroelectric power stations | 6 |
| Mining | 2 |
| Nautical | 3 |
| Navigation | 3 |
| Oil / petroleum | 12 |
| Shipbuilding | 12 |
| Space | 1 |
| Technology | 79 |
| United Nations | 2 |
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