log periodic
| loop antenna
| log periodic | |
| el. | 对数周期的 |
| loop antenna | |
| avia. | 环状天线 |
| el. од. | 环天线 |
| space од. | 环形天线 |
| |||
| 对数周期的 | |||
|
log periodic : 20 phrases in 7 subjects |
| Air defense | 3 |
| Electronics | 12 |
| Information technology | 1 |
| Space | 1 |
| Technology | 1 |
| Telecommunications | 1 |
| United Nations | 1 |