| 摘要 |
<p>Clamping pins (I) are provided at the edges of metal plates to be welded to form, e.g. large containers. (I) have abody, a groove and a centring head and to hold the plates in alignment for partic. electron beam welding, the (I) on each plate are clamped by a two armed hook with a central jack which bears on a support adjacent the plates.</p> |
