Digital library has had the important impact on traditional concept, communication equipment, library construction circuit, personnel training etc.
数字图书馆对传统观念、通讯设备、馆舍布线、人才培养等产生了极大的冲击和影响。
The concept of exchangeable digital circuit multiplication (EDCM) is proposed. The implementation technique of EDCM is put forward.
提出了可交换数字电路倍增的概念，并提出了在电路交换网上实现可交换数字电路倍增（ED CM）的技术。
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