IEC 61788-4-2020 pdf download.Superconductivity – Part 4: Residual resistance ratio measurement – Residual resistance ratio of Nb‑Ti and Nb 3 Sn composite superconductors. This part of IEC 61 788 specifies a test method for the determination of the residual resistance ratio (RRR) of Nb-Ti and Nb 3 Sn composite superconductors...
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