DIN EN ISO 11688-1:2009-11 Acoustics - Recommended practice for the design of low-noise machinery and equipment - Part 1: Planning (ISO/TR 11688-1:1995); German version EN ISO 11688-1:2009
2009DIN EN ISO 11688-1:2009-11 Acoustics - Recommended practice for the design of low-noise machinery and equipment - Part 1: Planning (ISO/TR 11688-1:1995); German version EN ISO 11688-1:2009
2009DIN EN ISO 11688-1:2009 Acoustics - Recommended practice for the design of low-noise machinery and equipment - Part 1: Planning (ISO/TR 11688-1:1995); German version EN ISO 11688-1:2009