| 摘要 |
<p>Front and rear annular wire rod members (101, 102) are disposed in an opposed state, and joined to each other by a cylindrical covering member (7), and intermediate annular wire rod members (12) are arranged between the two annular wire rod members (101, 102), an elasticity high enough to permit these annular wire rod members (101, 102, 12) to be bent being given thereto. In order that the front and rear annular wire rod members (101, 102) and end-side intermediate annular wire rod members (12A) disposed in the vicinity of at least the front and rear annular wire rod members (101, 102) can be moved relatively and longitudinally within a predetermined range with respect to the covering member (7) with annular clearances between the annular wire rod members (101, 102, 12A) and covering member (7) becoming liquid-tight, the annular wire rod members (101, 102, 12A) and covering member (7) are joined together via web members (30). <IMAGE></p> |
