摘要 |
<p>Inserted from below in a stand's (5) supports (6,7), a hydraulic lifting device (HLD) has an outer tube (OT) adapted to a section of the supports and a rectangular moving piston device (PD) in the outer tube. A base plate (47) fastens on one end of the PD. Each HLD links via a hydraulic pipe to a drive device (57) for moving each PD in and out in the OT simultaneously.</p> |