Home / Standards / GB/T 13428-1992 GB/T 13428-1992 Active Methods of measurement for the delta modulation equipment 增量调制终端设备测量方法 Standard Type GBT ICS 33.040.40 CCS M32 Status 现行 Issue Date 1992-03-10 Implementation 1992-12-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A