- [電子] 甚低頻電波傳播
- propagation of low frequency radio wave: 低頻電波傳播
- propagation of low-frequency radio wave: 低頻電波傳播
- propagation of very low frequency: 甚低頻電波傳播
- very low frequency propagation: 超低頻傳播
- propagation of high frequency radio wave: 高頻電波傳播
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