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信号的加密与破密、窃听与反窃听,是一对孪生兄弟,这对兄弟间的争斗贯穿于20世纪前半叶的所有战争及和平时期的重大事件之中。
Encryption and decryption of signals, eavesdropping and anti-eavesdropping are twin brothers who fight through all the wars and peacetime events of the first half of the 20th century.