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载波式闪光信号报警保护器由传感器、发射器和接收器三部分组成。
The alarming protector of carrier type glitter signal consists of sensor, launcher and receiver.
youdao
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载波式闪光信号报警保护器由传感器、发射器和接收器三部分组成。
The alarming protector of carrier type glitter signal consists of sensor, launcher and receiver.
youdao