| 摘要 |
<p>PROBLEM TO BE SOLVED: To shut away, in a flexible tube, electromagnetic waves caused by an electric wire inserted through the tube. SOLUTION: A flexible tube comprises a metal tube having on its outer periphery a recessed and projected part 1a by means of S-sectioned metal plates 2. The metal tube is coated with an elastic member 7 of synthetic resin such that an electric conductor 8 is brought into close contact with the recessed and projected part 1a along the longitudinal direction of the metal tube by the elastic member 7. That simple and economical constitution enables the flexible tube to circumferentially twist.</p> |
