Home / Standards / GB/T 3974-1983 GB/T 3974-1983 Abolished Telephone transmission interference allowances for long-distance high-capacity analogue microwave communication systems 大容量长距离模拟微波通信干线电话传输干扰容限 Standard Type GBT ICS 33.040 CCS M14 Status 废止 Issue Date 1983-12-05 Implementation 1984-10-01 Responsible Dept 工业和信息化部（通信） Drafting Unit N/A