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    What's the meaning of replacing PIDs?
    How do I change a PID?
    If PID changed in the module, whether need to reconfigure the network?
    Does the pid can be replaced repeatly?
    What is the validity period of the approved replacement certificate?
    What conditions need to be met to replace the pid?
    SN code can be exported without a code scanner?
    How long does it take to approve the review after the replacement certificate is submitted?
    Which model of the code scanner support to scan SN code?

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