 |
| |||
| impulse reflection; pulse echo | |||
| 脉冲反射: 39 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Business | 2 |
| Electronics | 5 |
| Metallurgy | 4 |
| Nuclear physics | 2 |
| Oil / petroleum | 2 |
| Space | 3 |
| Technology | 17 |
| Telecommunications | 1 |
|
| |||
| impulse reflection; pulse echo | |||
| 脉冲反射: 39 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Business | 2 |
| Electronics | 5 |
| Metallurgy | 4 |
| Nuclear physics | 2 |
| Oil / petroleum | 2 |
| Space | 3 |
| Technology | 17 |
| Telecommunications | 1 |