732 medium- and short-wave broadcasting transmitting and relay stations, covering 92.1 percent of the population;
共有中、短波广播发射台和转播台732座，广播综合人口覆盖率达到92．1％；
Reliability of reverse-power relay is of immediate effect on the secure operation of large and medium generator-transformer units.
逆功率继电器的可靠性直接关系到大中型发电机变压器组的安全运行。
Reliability of reverse-power relay is of immediate effect on the secure operation of large and medium generator-transformer units.
逆功率继电器的可靠性直接关系到大中型发电机变压器组的安全运行。
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