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据《commuaications News》1988年1月报道:由美国Technical Communications公司研制成的综合话音/数据保密装置——CSD 3324A把话音数字化装置,加密装置及
According to “commuaications News” reported in January 1988: The integrated voice / data security device developed by the US Technical Communications company - CSD 3324A voice digital devices, encryption devices and