实施日期:2009-08-01
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics; In situ values of sound reflection and airborne sound insulation
Road traffic noise reducing devices - Procedures for assessing long term performance - Part 2: Non-acoustic characteristics
实施日期:2008-01-31
发布日期:2008-09-01 实施日期:2008-09-01
实施日期:2009-05-01
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption; German version EN 1793-1:1997
实施日期:2001-08-01
Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of airborne sound insulation under direct sound field conditions
发布日期:2012-11-30 实施日期:2012-11-30
Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions
发布日期:2012-11-30 实施日期:2012-11-30
Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics of sound absorption
发布日期:2013-02-28 实施日期:2013-02-28
请选择需要导出的字段:
请选择需要导出的字段:
知识产权声明 | 服务承诺 | 联系我们 | 人才招聘 | 客户服务 | 关于我们
互联网出版许可证:新出网证(京)字042号 互联网药品信息服务资格证书号:(京)-经营性-2011-0017 信息网络传播视听节目许可证 许可证号:0108284
京ICP证:010071 京公网安备11010802020237号 京ICP备08100800号-1
客服电话:4000115888 客服邮箱:service@wanfangdata.com.cn 违法和不良信息举报电话:4000115888 举报邮箱:problem@wanfangdata.com.cn 举报专区:https://www.12377.cn
万方数据知识服务平台--国家科技支撑计划资助项目(编号:2006BAH03B01)©北京万方数据股份有限公司 万方数据电子出版社