 |
| |||
| sound inspector; sound phonoscope | |||
| sound detector; detector | |||
| 检声器: 44 phrases in 14 subjects |
| Automobiles | 2 |
| Aviation | 3 |
| Business | 1 |
| Chemistry | 2 |
| Compressors | 1 |
| Drilling | 1 |
| Electronics | 3 |
| General | 1 |
| Geophysics | 2 |
| Metallurgy | 5 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Space | 5 |
| Technology | 15 |