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Do cell phone jammers affect pregnant women?

1. The signal jammer is aimed at mobile transmitters and has no effect on the human body. 2. The cell phone jammer scans from the low-end frequency of the forward...

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Can the test room isolator be powered by DC?

When the college entrance examination and high school entrance examination are held as scheduled every year, some schools will be designated as examination rooms. During the construction of standardized examination...

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