| 摘要 |
The invention concerns a flexible heat-insulated tubular duct for transporting fluids, produced by spiral winding, with uniform pitch and with interval between the turns, at least a strip (14) of heat insulating material around the central flexible core (11). The invention is characterised by the joint winding without clearance of an intermediate extruded profile (1) in the interval (13) between the turns of the strip, said intermediate profile (1) being produced in a material substantially incompressible in volume.
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