echo box
| performance monitor
| echo box | |
| avia. | 回波谐振器; 回波谐振盒 |
| el. | 回波谐 振箱; 回波 谐振器 |
| mil., air.def. | 回波测试装置 |
| space од. | 回波箱 |
| tech. | 回波谐振腔; 回波共振腔 |
| performance monitor | |
| avia. | 性能监控器 |
| el. | 性能监测器 |
| multimed. | 性能监视程序 |
| |||
| 回波谐振器; 回波谐振盒 | |||
| 回波谐共振箱; 回波〔空箱〕谐振器 | |||
| 回波测试装置 | |||
| ★ 回波箱 | |||
| 回波谐振腔; 回波共振腔 | |||
| |||
| 回波谐振腔; 空腔谐振器 | |||
|
echo box : 10 phrases in 5 subjects |
| Air defense | 2 |
| Aviation | 2 |
| General | 1 |
| Nautical | 1 |
| Technology | 4 |