Home / Standards / GB/T 11670-1989 GB/T 11670-1989 Abolished Acoustics--Characteristics and specifications for laboratory standard condenser microphones 声学 实验室标准电容传声器的特性与规范 Standard Type GBT ICS 17.140 CCS A42 Status 废止 Issue Date 1989-10-12 Implementation 1990-04-01 Responsible Dept 工业和信息化部(电子) Drafting Unit 工业和信息化部(电子)