There are four means for transmission, wireless, optical waveguide fibre, microwave relay and satellite transmission.

传输方式有地面无线、光纤、微波中继及卫星传输等。

youdao

There are four means for transmission, wireless, optical waveguide fibre, microwave relay and satellite transmission.

传输方式有地面无线、光纤、微波中继及卫星传输等。

youdao