| 摘要 |
A frame for bounding an open end of a recess includes an upstanding, peripheral wall having protruding outwardly therefrom a flange. The frame includes, within the peripheral wall, plural seatings for a cover that is insertable into the frame. Each seating includes a seating member having secured thereto a resiliently deformable pad, part of which protrudes beyond the seating member to provide a resiliently deformable seating that is engageable by part of the cover. |
