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Sumitomo Electric has been commercially producing the silver-sheathed Bi2223 multi-filamentary wires,especially under the name of DI-BSCCO (Dynamically-Innovative BSCCO).DI-BSCCO wire is the name of various types of BSCCO wire.Type H is silver sheathed bare wire,Type HT is reinforced wire,Type G uses gold-silver alloy for sheath metal.