单词	extra low frequency
释义	同ELF--extra low frequency
随便看	cathode-catalyst stability cathode [= catelectrode cathode--catelectrode cathode [= catelectrode; kathode; negative electrode; negative pole] cathode cavity cathode chamber cathode choke coil cathode chromism cathode coating cathode compartment cathode control cathode copper cathode corrosion cathode-coupled amplifier cathode coupled dc amplifier cathode-coupled multivibrator cathode coupled stage cathode coupled stage--cathode follower cathode coupled video amplifier cathode coupling cathode-coupling cathode current cathode dark cathode dark current cathode dark space