| 摘要 |
<p>The device has a U-bolt (2) with branches connected by a curved bottom (5), and a conductive abutment (10) mounted between the two branches. The abutment has a contact side (12) contacting with an electrical cable. A driving unit allows the displacement of the U-bolt relative to the abutment to alternately bring together and space apart the bottom and abutment. The side is of concave form whose concavity is bent towards the bottom.</p> |
