本文从理论和实验上指出：在多纤维复合超导体中，基体铜的直流电阻呈现明显的尺寸效应。

The obvious size effects of electrical resistance of copper in multifilamentary superconducting composites have been pointed out in this paper.

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本文介绍一种用于直流超导磁体的失超信号探测方法。它具有简单、可靠、灵敏等优点。

Presented in this paper is a detective method o? The quenching signal for the d. c. superconducting magnets. It has the advantage of simplicity, reliability and high sensitivity.

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虽然超导电缆能够在传导强大电流并经受强烈磁场的同时保持其零电阻，但是这仅限于直流电。

While the superconducting tape can carry very high currents and withstand large magnetic fields and still retain its zero resistance, this is only true with direct current.

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