| 摘要 |
<p>The invention relates to a multi-layer pressure pipe (20) of a plastic material. The multi-layer pressure pipe (20) is formed by using as the extruder an extruder (10) which cross-orients the reinforcement fibers in the extruded material in the successive layers (21, 22, 23, 24), and the material extruded is a polyolefin which contains long-fiber reinforcements.</p> |
