Home / Standards / GB/T 13170.4-1991 GB/T 13170.4-1991 Abolished Test charts of reflection for television--High-frequency test chart 反射式电视测试图 高频特性测试图 Standard Type GBT ICS 17.180.20 CCS L38 Status 废止 Issue Date 1991-09-04 Implementation 1992-05-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A