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  • 10-23

    The factors that affect the distance and effect of interphone are as follows: 1, system parameters (1) the stronger the transmitters output power is, the larger the coverage of the transmitting signal is and the farther the communication di

  • 10-23

    After the intercom industry entered unprecedented fierce competition in China, the product-centered marketing model is losing its effectiveness. Especially for the Chinese independent brand intercom enterprises, price war is no longer a lon

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