| 摘要 |
The present invention relates to a post (12) made of a first material (2) comprising an element (13) made of a second material that is softer than the first material. The element is partially embedded in the first material and has a front surface (6) that forms part of the surface of the post. The element comprises in a cross section perpendicular to the longitudinal axis of the post a front portion (8′) including the front surface and a rear portion (9′). The element is designed so that a waist (w1, w2) is formed between the front and rear portions. The front portion is tapering towards the waist and at least a part of the rear portion has a width larger than the width of the waist. |
