短語詞組短語extremely low frequency emission 超低頻放射;翻譯;超低頻發(fā)射extremely low frequency transmitting 超低頻發(fā)射extremely low frequency propagation [電子]極低頻傳播extremely low frequency field 工頻電場Extremely Low Frequency Radiator 極低頻電磁輻射器extremely low frequency antenna 極長波天線ELF extremely low frequency 極低頻Extremely Low Frequency Electromagnetic Field 研究極低頻率電磁場;觀察極低頻電磁場;極低頻率電磁場extremely low frequency magnetic fields 極低頻磁場 返回 extremely low frequency