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无线通信中为降低电子干扰和加强保密，采用扩频技术降低发射功率，使发射功率小于或等于１Ｗ，不影响已有的任何无线通信设备的正常运行。
In order to reduce the electronic interference and strengthen the secrecy in the wireless communication, adopt the spread spectrum technology to reduce the transmitting power, make the transmitting power less than or equal to 1W, does not influence the normal operation of any existing wireless communication apparatus.