| 摘要 |
<p>The bicycle chain case is of plastics and in top and bottom parts both forming a U-shaped recess round the chain. Each part is in two halves, joined together only along the outer edge of the chain case, while the respective halves of the top and bottom parts have flanges bearing against each other and movable apart by elastic distortion of the parts. The flanges are secured to each other by detachable screws. In one of the halves inserts can be cast into the corner areas, in which the screws engage. FL.</p> |
