| 摘要 |
The composite corrugated tube (10) has inner and outer tubes (12,14) comprising respective cylindrical portions (16,18). The median diameter of cylindrical portion (18) is smaller than mean diameter of cylindrical portion (16). The cylindrical portion (18) is connected with edge portions (20) of outer tube by inner transition sections (24). The cylindrical portion (16) is connected with edge portions by a curved outer transition section (22). The ratio between length (l) of cylindrical portion (16) and curvature radius (ro) of outer transition section is 0.1-1. |
