| 摘要 |
<p>Constricting ring, of the type which consist of a metallic strip, rolled up onto itself and with closure of its free ends by dovetailing, which has the feature that in order to obtain a convergent reaction of the laterals of the profiled deep indentation of the female end of the ring towards the edges of the male element, in the central part of the head of said male end of the constriction means there is provided a gully from which emerges the central engagement stem, for which the lateral sections of the head of said end which are located on the right and left of the start of the central stem are arranged at an acute, blunt angle, each section of said head and the outer ends of the transverse line being advanced in relation to the location of the central gully. <IMAGE></p> |
