... 严格的频谱限制：severe spectrum limitations 调频广播业务：FM broadcasting services 传播路径衰耗：propagration path loss ...
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fm broadcasting service
调频广播服务
以上为机器翻译结果，长、整句建议使用 人工翻译 。
FM sound sync-broadcasting has overlapped service zone, the same carrier frequency and the source of the program, which can broadcast in-phase at the same time.
调频同步广播系统是具有重叠服务区，使用同一载频和同一节目源，同时同相位广播的调频发射技术。
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