ICs33.160.01M60GB中华人民共和国国家标准GB/T17148-1997idt ITU-R571-2:1990模拟声音节目信号的常规测试信号一用于测量节目信道间的干扰A conventional test signal simulating sound-Programme signals for measuring interference in other channels1997-12-12发布1998-10-01实施国家技术监督局发布
copyright@ 2008-2023 wnwk.com网站版权所有
经营许可证编号:浙ICP备2024059924号-2