| 摘要 |
<p>From a continuous strip of plate (1) by stamping are obtained the parts (2-2'), which are identical in shape and size to each other, and which form two longitudinal and marginal alignments in which said parts are opposite each other, each part adopting an asymmetrical E-shape with its outer legs (3-4) having equal widths and also equal to the width of the common leg (2), but half the length of its middle leg (5), and with said legs (3-4) having clearly different lengths while the middle leg (5) has an intermediate length, and with the separation between said middle leg (5) and the outer legs (3-4) equal to the width of the latter legs. <IMAGE></p> |
