featured The shielding effect of the full-band signal jammer is not ideal. How to improve the shielding effect?
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What is the role of the signal jammer in the exam room during the exam?
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How to improve the interference effect of the full-band jammer when the on-site signal is too strong?
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Do you need to install a full-band signal jammer in the army?
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The need for installing full-band signal jammers in prisons
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