| 摘要 |
<p>The safety barrier, along the sides of roads and traffic lanes, is a box profile (P') with a rectangular cross section on a longitudinal axis (x). It is shaped by the surfaces (W',W") of two tools (60,70) from a flat sheet, with two sections (A,E) and a transit section (V) between them to give the edges (K-K"') of the box profile. The edges of both sections are in parallel and over each other at the transit.</p> |
