| 摘要 |
<p>The base (1) of the unit is rectangular and has a vertical extension at the back and a longitudinal slot at the bottom serving as guides. A ball joint is accommodated between two rectangular vertically positioned holding plates (2) and provided with a bar (4) fitted with an element (5) for the insertion of the stick extending from the cast (7). The position of the cast (7) can be adjusted for processing using an integrated two dimensional spirit level (6).</p> |
