特低頻:修订间差异
外观
删除的内容 添加的内容
小 机器人移除:en (strong connection between (2) zh:特低頻 and w:Ultra-low frequency),nl (strong connection between (2) zh:特低頻 and nl:Ultra low frequency),es (strong connection between (2) zh:特低頻 and es:ULF) |
小无编辑摘要 |
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'''特低頻''' |
'''特低頻'''('''ULF''', Ultra Low Frequency)是指[[頻帶]]由300Hz到3000Hz的[[無線電波]]。通常於[[礦場]]內使用,也可以作[[地質勘探|勘探地質]]和[[地震]]用。 |
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==外部連結== |
==外部連結== |