![]() |
| |||
甚低频 | |||
极低频300Hz ~ 3kHz | |||
极低频率、特低频率 | |||
极低频 | |||
极低频 (30 ~300 Hz) | |||
极低频率 | |||
极低频< 300Hz; 极低频< 300Hz | |||
English thesaurus | |||
| |||
ELF (3 Hz - 3 kHz) | |||
ELF |
extremely low frequency : 11 phrases in 6 subjects |
Air defense | 2 |
Aviation | 2 |
Electronics | 2 |
Information technology | 2 |
Space | 2 |
Technology | 1 |