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JJG869-2002电话电声测试仪
可可G中华人民共和国国家计量检定规程JJG869一2002.电话电声测试仪Electro-acoustical Measurement Instrumentsfor Telephone Set2002-09-13发布2003-03-13实施国家质量监督检验检疫总局发布
环境影响评价技术导则-生态影响（HJ-19—2022代替-HJ-19—2011）
HJ中华人民共和国国家生态环境标准HJ19-2022代替HJ19一2011ironment环境影响评价技术导则生态影响Technical guidelines for environmental impact assessment动一Ecological impact本电子版为正...
TYT_MD-9600_使用说明书手册
To customersThank you very much for using MD-9600 DMR mobile radioThis product has a newly developed function menu andhumanism operation design,making it easy to useIt wll meet you...
