| |||
echo-ranging | |||
echo ranging | |||
echo ranging (法); echo-ranging detection (法) | |||
| |||
echo-ranging | |||
| |||
echo ranging | |||
| |||
echo ranging |
回声 测距: 30 phrases in 9 subjects |
Agriculture | 1 |
Aviation | 1 |
Earth sciences | 4 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
Geophysics | 2 |
Navigation | 2 |
Oil / petroleum | 4 |
Technology | 13 |