| 摘要 |
PROBLEM TO BE SOLVED: To provide a polygonal sheath resistant to an external pressure by smoothly filling a grout and saving the filled amount thereof in the polygonal sheath as a protective tube for a cable. SOLUTION: In this synthetic resin sheath 1 as the protective tube loosely fitted to the outside the cable, the cross sectional shape of the body 2 of the sheath is a polygonal shape. A reinforcement rib 3 with any width having an outline formed in a roughly circular or elliptic shape is fitted onto the sheath in the axial direction a. COPYRIGHT: (C)2006,JPO&NCIPI
|
