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//定义主机正在通讯闪灯信号 定义主机通讯的从机号 定义主机通讯传送握手信号 定义从机回复通讯握手信号 定义数据包的头 定义数据包的尾-//definition of mainframe communications are flashing light signal definition mainframe communications from the definition of mainframe machines, handshake signal transmission from the plane defined response communications handshake signal definition data packets in the first data packet definition of the tail