| 摘要 |
<p>The mould has two circular metal walls (2, 3) forming the exterior and interior shutters of the wall and groups of radial cylinders (5) mounted on plates (7) can penetrate the gap (6) between the shutters. The plates are connected to a central sliding shaft (8) by the articulating connecting rods (9), the central shaft having two parts (10, 11) sliding within each other. When central jack (12) makes one part (10) lift, the radial cylinders are pulled out of the space. The amount of travel of the section and the horizontal alignment of the plates are limited by upstands (14) and adjusting screws (15) touching a stop.</p> |
