| |||
| señales de eco | |||
|
echo : 276 phrases in 33 subjects |
| Acoustics | 18 |
| Antennas and waveguides | 1 |
| Astronomy | 1 |
| Automated equipment | 3 |
| Communications | 77 |
| Construction | 1 |
| Drilling | 2 |
| Earth sciences | 19 |
| Electronics | 53 |
| Fish farming pisciculture | 1 |
| Fishery fishing industry | 5 |
| General | 2 |
| Health care | 1 |
| Information technology | 13 |
| Labor law | 1 |
| Law | 2 |
| Measuring instruments | 3 |
| Medical | 10 |
| Meteorology | 14 |
| Microsoft | 2 |
| Natural sciences | 2 |
| Physical sciences | 5 |
| Physics | 1 |
| Piezoelectric crystals | 1 |
| Power lines | 7 |
| Radio | 3 |
| Radiolocation | 2 |
| Remote sensing | 2 |
| Technology | 13 |
| Telecommunications | 1 |
| Telephony | 1 |
| Transport | 5 |
| United Nations | 4 |