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1·Applicable to close-circuit TV system below 1GHz, public antenna system (CATV/MATV) as branch line and owner line or equipment line or internal line for other high frequency machine.

用于1GHz以下闭路电视系统，共用天线系统（CATV/MATV）作为支线和用户线以及其它高频率机器的连接线或内部配线。