| 摘要 |
<p>A levelling device (1) is disclosed (1) that includes a levelling bar (2) supported by a mainframe (3), and a pair of wheeled side carriages (4) which are able to be manoeuvred to avoid obstructions and for height adjustment relative to the mainframe allowing adjustment for different tracking surfaces. Also disclosed is a levelling device having a platform for mounting a vibrating device, the platform being pivotally attached to the trailing end of the mainframe and adjustable from a horizontal plane to a substantially vertical plane behind the levelling bar.</p> |
