| 摘要 |
<p>The profiled rail (5) has a cross section profile, formed of steel, which has a helical groove section (8) cooperating directly with fixing bolts and a retaining section (9,9') arranged beside the helical groove section for sealing materials. Window-like fretworks (10a,10b) are provided between the helical groove section and the retaining section, by which the lower surface of the helical groove section is accessible for mounting of a welding seam (11) between profiled rail and a substructure of a building.</p> |
