Home / Standards / GB/T 13431-1992 GB/T 13431-1992 Abolished Performance requirements for 120-channel submarine coaxial cable carrier telephone equipment 120路海底同轴电缆载波电话设备技术要求 Standard Type GBT ICS 33.040.60 CCS M31 Status 废止 Issue Date 1992-03-10 Implementation 1992-12-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A