电视台、无线电台和手机公司倚靠这类铁塔传送讯号。
Television, radio, and cell phone companies depend on such towers to transmit their signals.
讯号转换中继台的建置有三个目的，一为拓展基地台之覆盖范围，二为消弭覆盖范围内的死角，三是提升基地台覆盖边缘的吞吐量。
The first is to extend the coverage area of one base station. The second is to eliminate the coverage holes. The third, to enhance the throughput on the cell edge.
若天文台于以上时间悬挂八号或以上台风或黑色暴雨警告讯号，有关活动将延期进行。
The training session will be postponed, if typhoon signal no. 8 or above is hoisted or black rainstorm signal is in force at that time.
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