| 摘要 |
The method involves forming perforations in the wall of a tubular base element (11). The wall forms outwardly projecting, radially encircling support sections which are connected with sleeve-shaped distribution supports (12) in the orbital welding process. The forming of the circumferential support sections takes place by a machining step and by material removal of the base element in an area of the base element in form of a recess. The area radially surrounds the circumferential support sections. |
