2004DIN EN 4563:2004-08 Aerospace series - Pipe coupling, welded, in heat resisting steel - Tees - Inch series; German and English version EN 4563:2003
2004DIN EN 4563:2004 Aerospace series - Pipe coupling, welded, in heat resisting steel - Tees - Inch series; German and English version EN 4563:2003