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https://www.jammer-buy.com/wifi-jammer/c-29.html


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It goes without saying that you should not use mobile phones in class, but as a measures for stu ...
It goes without saying that you should not use mobile phones in class, but as a measures for students to stop the use of mobile phones, even if they remain cautious, you can also use the wifi jammers in the classroom to make mobile phone radio waves. ...
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