active noise
| control
| active noise | |
| avia. | 主动型噪声 |
| control | |
| hydroel.st. | 调节 |
| hydroel.st. од. | 控制 |
| IMF. | 管制 |
| manag. | 管理、管制; 核对; 存根 |
| met. | 调整; 操纵; 控制装置 |
| pest.contr. | 防治 |
| |||
| 主动型噪声 | |||
|
active noise : 20 phrases in 8 subjects |
| Air defense | 1 |
| Automobiles | 4 |
| Aviation | 5 |
| Ecology | 1 |
| Electronics | 4 |
| General | 1 |
| Space | 2 |
| Technology | 2 |