| 摘要 |
<p>The rigid metal triangular section (1) has soldered on its vertical side of the right angle two metal pieces (2) which offset the section (1) from the alignment of its rotational axles (3,4). The two pieces (2) fit into two hinges (5,6) made of tubes welded onto a section which is fixed to the shuttering panel. The base of the triangular piece (1) has, on the end furthest away from the shuttering panel, a hole into which a bolt (10) is soldered. A threaded rod (7) runs through the bolt and rests on a foot (8) on the ground. A handle (9) enables the threaded rod (7) to be adjusted in height. The section is fixed in position by a pin (11) passing through the pivot axis (3), for vertical position.</p> |
