| 摘要 |
<p>A device (10) for placement over an opening in a hollow wall to provide a backing for the opening for purposes of repair of the wall or to provide a desired item, such as an electrical box, installed in the wall, includes a housing (14), an extension member (16), for selective extension from the housing, extension mechanism (54) for extending the extension member from the housing, and a plate or tabs (43) for abutting the inside face of the wall adjacent the opening therein.</p> |
