| 摘要 |
<p>An anchorage has two members (1, 2; 18, 21; 1, 23), one fixed the other at the end of a strap or other element to be secured, which hook together. One member, usually the fixed one, may be a stud (2, 23) of mushroom form while the other (1) may be a D-shaped plate (3) with the curved periphery extended out of the plane of the plate to form a U-shaped channel (4) that can hook onto the head (8, 24) of the stud. But formations (14, 7) on the head (8, 24) and on the plate (3), or a wall (17) around the stud (2), allows full engagement only in one direction, while after that mutual rotation through at least 90° makes the hooked member (1) captive to the stud (2, 23).</p> |
