grounded antenna造句

• This has since been confirmed by russian sources ; the transmitter consists of two swept - frequency generators of sinusoidal voltage and two parallel horizontal grounded antennas , each about 60 km long
  这一点被来自俄方的消息所证实；发射机有两个扫频发生器，产生正弦波，同时有两幅相互平行的水平地面天线，每个天线有60千米长。