| 摘要 |
<p>Machine for replacing and laying track portions comprises a portal structure of adjustable height and width having two lifting hooks (30) and swivel mounted wheels (12) for transferring the machine along a railway line (2); such portal structure consisting of a flat rectangular frame (3) having pairs of telescopic feet (7-8) at its opposing ends, pairs of mutually orthogonal carriages being provided, sliding longitudinally and transversely to the flat frame to support the lifting hooks (30).</p> |
