DIN EN 1507:2006-07 Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage; German version EN 1507:2006
2006DIN EN 1507:2006-07 Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage; German version EN 1507:2006
2006DIN EN 1507:2006 Ventilation for buildings - Sheet metal air ducts with rectangular section - Requirements for strength and leakage; English version of DIN EN 1507:2006-07