Variable-delay system

作者: Richman Donald

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参考文章(7)
John C Steinberg, Variable delay speech privacy system ,(1941)
William Gross, Scott James H, Valentine James W, Method and apparatus for discriminating frequency modulated records ,(1954)
Atkins Carl Edward, Secret signaling system ,(1943)
Herbert S Haynes, Pulse code modulator ,(1952)
James F Craib, Secrecy communication system ,(1942)