| 摘要 |
<p>Supporting bar of the type that is made up a core (2), easily bent on said longitudinal plane, wrapped in an external casing wich exerts evenly distributed centripetal pressure along the whole lengt of the bar. Over the core there are applied a pair of flexible strips (6), tightly held against said core by the mentioned external casing. This external casing comprises a first internal layer (7) constituted by a thermoretractable plastic tube; a second layer (8) made of essentially nonelastic tape and wrapped with some pressure around the first layer; and preferably a third external layer (9), made of a flexible material, wrapped around the second layer to enhance the external appearance of the bar.</p> |
