| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a mark tube that expresses appropriate frictional force between the mark tube and a cable to be inserted thereinto and can hold the cable at a predetermined position even when there is large difference in outer diameter between the mark tube and the cable to be inserted thereinto, and therefore can be suitably used for cables with various types of outer diameters.SOLUTION: A mark tube 1 is integrally molded of polyvinyl chloride. A tube body 2 is formed in a long cylinder shape having predetermined diameter, and predetermined identification information (characters and symbols) is displayed on the outer peripheral surface of the tube body 2. Belt-like two ribs 3,3 having constant width are provided from the inner peripheral surface of the tube body 2 to be in parallel to each other along the longitudinal direction.</p> |
