| 摘要 |
A multilayer duct (1) of which at least one layer (2) comprises a strip (3) wound helically in the form of contiguous turns, said strip (3) comprising a longitudinal support (4) and protective plates (5) fastened to said support (4), said protective plates (5) being organized on said support (4) in parallel rows (6), each row (6) of plates being separated from an adjacent row (6) of plates by a free space forming a separating line (7), the separating lines (7) being mutually parallel. The separating lines (7) between rows (6) of plates (5) each extend in a plane perpendicular to the longitudinal axis of the duct (1). |
