| 摘要 |
The wooden structural element (1) has a first surface (3) with measurement marks (4) extended in the direction of a timber element. A recess (2) is introduced in the measurement marks. The recess is stamped and is thermally or chemically introduced into the surface. The depth of the recess is corresponded to the dimension of the timber element in the extension direction of the depression. The measurement marks is applied thermally, chemically, or with paint, in r by a laser. |
