目的：介绍一种基于低压电力线通信的病房呼叫系统。
Objective To introduce ward calling system based on power line communication.
结果表明，该低压电力线扩谱通信系统具有较强的抗干扰能力。
The experiment results indicate that the system has rather strong anti-jamming ability.
结果表明，该低压电力线扩谱通信系统具有较强的抗干扰能力。
The experiment results indicate that the system has rather strong anti-jamming ability.
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