very-low frequency band甚低频频带
very low frequency communication甚低频通信
very low frequency band甚低频波段
very low frequency measurement甚低频测量
very low frequency components极低频成分
very low frequency navigation甚低频导航
very low frequency antenna[电讯] 甚低频天线;甚低频天线
very low frequency receiver甚低频接收机
very low frequency emission甚低频发射;翻译
N(名词) a radio-frequency band or radio frequency lying between 3 and 30 kilohertz 甚低频 ( abbr: VLF)