directional variable
| microphone
| directional variable | |
| tech. | 方向变量; 方位变量 |
| microphone | |
| gen. | 麦克风 |
| avia. | 耳机 |
| met. | 话筒 |
| met. од. | 传声器 |
| radio.amat. | 扩音器; 麦克风 |
| space | 送话器; 扩音器 |
| tech. | 扩声器; 机内话筒 |
| |||
| 方向变量; 方位变量 | |||
|
directional variable : 2 phrases in 2 subjects |
| Electronics | 1 |
| Wind Energy | 1 |