标准号:NF S31-127-2009
英文标准名称:Acoustics - Laboratory measurement procedures for ducted silencers and air-terminal units - Insertion loss, flow noise and total pressure loss
标准状态:A
标准类型:国际标准
发布日期:2009-11-07
国际标准分类号:17.140.01%91.120.20
部分代替标准:NF S31-127-2004