Home / Standards / GB/T 14431-1993 GB/T 14431-1993 Active Protection ratios and minimum usable field strengths required in thd radio services 无线电业务要求的信号/干扰保护比和最小可用场强 Standard Type GBT ICS 33.100 CCS M04 Status 现行 Issue Date 1993-06-09 Implementation 1993-12-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A