| 摘要 |
<p>A rail welder which includes two clamping units (l2, l4) which are supported by a beam (l6) which is affixed to a boom for raising and lowering the rail welder to the rails which are to be welded together. The two clamping units are coupled to one another by a pair of upset tube assemblies (l8, 20) which extend between and through both clamping units. Each of these upset tube assemblies is formed of a hollow rectangular tube (22) which supports within them a straight edge (24, 26) which is used geometrically to align both horizontally and vertically the rails to be welded together.</p> |
