| 摘要 |
<p>The invented device for adjusting position of back irons (1) of machines for working artificial jewellery stones is formed by a body (2) having functional surfaces (7, 8) of the same performance with the functional surfaces of an apparatus, to which two gauges (3) of height and a protractor (5) or one gauge (3) of height and two protractors (5) are fixedly attached, whereby the gauges (3) of height and the protractor (5) have movable parts (4, 6).</p> |
