... power test codes 动力试验规程 predetermined code 预先编定的号码系统 prefix code 字首码 ...
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A cryptographic system in which units of plain text of regular length, usually letters, are arbitrarily transposed or substituted according to a predetermined code.
密码:一种密码系统,其中固定长度的明文里的单元,通常为字母,被任意倒置或按事先确定的符号系统替换。
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