noise spectral density
| function
| noise spectral density | |
| space | 噪声谱密度 |
| function | |
| gen. | 运行; 工作 |
| hydroel.st. | 作用 |
| interntl.trade. | 效用; 职能 |
| light. | 功能，用途 |
| math. | 运算 |
| met. | 功用; 用途 |
| |||
| 噪声谱密度 | |||
|
noise spectral density : 5 phrases in 4 subjects |
| Air defense | 1 |
| Electronics | 1 |
| Space | 2 |
| Telecommunications | 1 |