DIN EN 12380:2003-03 Air admittance valves for drainage systems - Requirements, test methods and evaluation of conformity; German version EN 12380:2002
2003DIN EN 12380:2003-03 Air admittance valves for drainage systems - Requirements, test methods and evaluation of conformity; German version EN 12380:2002
2003DIN EN 12380:2003 Air admittance valves for drainage systems - Requirements, test methods and evaluation of conformity; German version EN 12380:2002