Home / Standards / GB/T 45506-2025 GB/T 45506-2025 Active Residual resistance ratio measurement—Residual resistance ratio of cavity-grade Nb superconductors 剩余电阻比测量 谐振腔级铌超导体剩余电阻比测量 Standard Type GBT ICS 17.220;29.050 CCS L85,H62 Status 现行 Issue Date 2025-04-25 Implementation 2025-11-01 Responsible Dept 中国科学院 Drafting Unit N/A