| 摘要 |
The present invention relates to a longitudinal construction element (1) with a core (3), the core (3) having a generally-cylindrical form and a plurality of chambers (4) extending in the longitudinal direction (L) of the construction element (1), the chambers (4) being delimitated by intermediate walls (5), wherein the intermediate walls (5) are deposited successively in layers by means of a 3D-printing process, wherein at least one cross-sectional area (16a, 16b) of the intermediate walls (5) is made of electrically, optically, or thermally conductive material throughout said longitudinal direction (L), wherein in case of two or more such areas these are separated from one another by non-conductive cross-sectional areas (17). |
