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Tape shaped silver-sheathed Bi-2223 superconducting wire (Bi-2223 tape) technologies are reported. The operations of superconducting apparatus at liquid nitrogen temperature or at 20-30 K are expectable by using Bi-2223-tapes. The reduction of AC loss at 77 K is critical for power cable application, such as electric transmission cable and transformer prototypes. Thinning of the tape thickness and...
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