Home / Standards / GB/T 14474-1993 GB/T 14474-1993 Abolished General specification for horn loudspeakers 号筒扬声器通用技术条件 Standard Type GBT ICS 33.160.50 CCS M72 Status 废止 Issue Date 1993-05-21 Implementation 1994-02-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A