| 摘要 |
<p>A security closure comprising a frame (11) which defines the perimeter of the closure where the frame is adapted to be mounted across an opening, a perforate sheet element (13) supported by said frame (11) to close the space defined by the frame (11), said perforate sheet element (13) being formed of a non-expanded sheet material having a plurality of closely spaced apertures punched therein which are dimensioned to prevent insect access through the apertures.</p> |
