| |||
| 音量控制器; 增益调节器; 音量调节器 | |||
|
volume controller : 10 phrases in 7 subjects |
| Engineering geology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Polymers | 1 |
| Shipbuilding | 1 |
| Technology | 3 |
| |||
| 音量控制器; 增益调节器; 音量调节器 | |||
|
volume controller : 10 phrases in 7 subjects |
| Engineering geology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Polymers | 1 |
| Shipbuilding | 1 |
| Technology | 3 |