“duplicate key”的概念、定义、翻译、参考文献-科学参考

单词	duplicate key
释义	duplicate key [`düp·lǝ·kǝt `kē] ^{COMPUTER SCIENCE} 1. A key on the card punch which, when depressed, will copy a card in the reading station onto a card in the write station. 2. A record that contains the same identification data as another record in the same file.
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