ICS01.140.20A14广州市地方标准DB4401/T50.3—2020代替DBJ440100/T121.3—2012声像档案质量要求第3部分：音频Qualityrequirementsfortheaudio-visualarchives—Part3：Audios2020-06-08发布2020-07-01实施广州市市场监督管理局发布DB4401GZZWDB4401/T50.3—2020I目次前言..............................................................................................................
