目前日本的西部和东部不能够共用电能是因为不同的传输频率导致的，而这在一百多年前就如此了。
West and east Japan are unable to share electricity because of different transmission frequencies dating back more than a century.
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。
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。
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.
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