Home / Standards / GB/T 12274.4-2021 GB/T 12274.4-2021 Active Quartz crystal controlled oscillators of assessed quality—Part 4: Sectional specification—Capability approval 有质量评定的石英晶体振荡器 第4部分:分规范 能力批准 Standard Type GBT ICS 31.140 CCS L21 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A