Does the World Cup need signal jammers to provide security services?

Thread creado por gaoling el 29/06/2018 08:37:06 am. Lecturas: 1. Mensajes: 1. Favoritos: 0

29/06/2018 08:37:06 am 

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Hello, everyone! I know the signal jammer is very popular in all countries, but it seems to be illegal, but in many public places will use this signal interference device, during the World Cup many games will have security protection measures, but need to use the signal jammers?

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