| 摘要 |
The cover fixture has male (13) and female (14) components. Both the components have two arms (15,16; 17,18), the arms of the one being longer than those of the other. At least one of the arms on the male component has an outwardly directed heel (25,27) in its outer end, and also on the male and female components being brought together. This heel works in conjunction with a similar structure on the female component to form a union which is then secured by a number of separate lock screws (11). |
