| 摘要 |
<p>At its edges for assembly, the collar has protruding tongues (14) on a rib (16), and a wide central part (17) and an outer end (18). When the collar is to be assembled, each tongue (14) is passed through a C-shaped first slot (30), and the rib (16) of the tongue is placed in the bottom of the C-shaped first slot (30), and the outer end (18) of the tongue is snapped through the C-shaped second slot (40), which does not allow the wider central part (17) of the tongue to pass. The tongues (14) are hereby locked in an associated pair of a first slot (30) and a second slot (40).</p> |
