DIN CEN/TS 13547
DIN CEN/TS 13547 Industrial valves - Copper alloy ball valves; German version CEN/TS 13547:2006
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2007
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2007