Home / Standards / GB/T 12357.4-2016 GB/T 12357.4-2016 Active Multimode optical fibres for telcommunication—Part 4: Sectional specification for category A4 multimode fibres 通信用多模光纤 第4部分：A4类多模光纤特性 Standard Type GBT ICS 33.180.10 CCS M33 Status 现行 Issue Date 2016-04-25 Implementation 2016-11-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A