| 摘要 |
<p>The pipe consists of a series of layers: an inner plastic sleeve (4) between two metal short-pitch windings (3, 5) with engaging coils, at least one layer of long-pitch traction armoring (6, 7) and an outer sealing sleeve (8). It has at least one continuous short-pitch spiral winding (9) over the outer armoring layer (7) so that its coils lie at least partially in the gaps (12) in the armoring layer and compressed partly into the outer sealing sleeve.</p> |
