| 摘要 |
<p>The box frame is for displaying pictures or drawings, and consists of a box, in the front side (2) of which is a window (3) with a rim (4) around it. The back side of the case has two hooks (6) on a long and short side, for hanging up the frame. The window is covered by a sheet of transparent material (5). The picture can be changed by inserting a new picture in the back of the frame, to be retained by a folded panel.</p> |
