Because of HF transceiver has been widely used in the military field, so without its sophisticated testing equipment will give the security of our country's military communications hidden danger.

由于跳频收发信机已经在我国军事领域广泛应用，没有成熟的测试设备，会给我国军事通信的安全性造成隐患。

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JEI has been providing Communications Recording Systems, Voice Logging Recorders, and custom Audio equipment for public safety and military intelligence applications since 1967.

JEI自1967年以来一直致力于为公众安全和军事情报提供通讯录音系统，语音记录器以及定制音频设备。

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Widely used in aerospace, military, communications, medical, sports equipment, construction and Marine fisheries and other fields.

广泛应用于航空航天、军工、通讯、医疗、体育器材、建筑和海洋渔业等领域。

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What is more, telephone switches have numerous applications in dedicated military command, control and communications equipment.

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Rare earth elements are also used for military applications, such as advanced optics technologies, radar and radiation detection equipment, and advanced communications systems, according to a 2011 research report by the US Government Accountability Office.

BBC: US to build $120m rare earth research institute