Halving the repeater spacing made it possible to quadruple the Bandwidth.
将增音机间距减少一半，能使宽带增加3倍。

Echo - repeater dopplerizer
回声转发多普勒效应器

Halving the repeater spacing made it possible to triple the bandwidth.
把收音机间隔缩小一半,就能使带宽增加三倍.

We manfucture CDMA,GSM,PHS base station antennas; 800MHz Trunking Repeater Digital antenna and indoor antennas; Wireless Public Telephone antennas; the band antennas and microwave antennas .
我公司生产终端天线（数字电视天线，车载娱乐系统天线，无线供话天线，网卡天线，手机天线）；CDMA,GSM,PHS基站天线，室内信号分布天线；微波天线等。