| 摘要 |
<p>The device includes a bridge member with a central hole and spaced parallel arms which extend on one side. There is a U-shaped gripping member which has its threaded hole in its upper part and opposed (opposite) fingers in its lower part. There is a tightening bolt (pin) which is received slidably in the bridge member and is screwed into the gripping member. The gripping member is received between the arms of the bridge member and, when the bolt is tightened, entrains the gripping member upwards with respect to the bridge member.</p> |
