Home / Standards / GB/T 7341.4-1998 GB/T 7341.4-1998 Active Audiometers--Part 4:Equipment for extended high-frequency audiometry 听力计 第4部分 延伸高频测听的设备 Standard Type GBT ICS 17.140.01 CCS A59 Status 现行 Issue Date 1998-05-08 Implementation 1998-12-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A