Picture frame comprises backing plate, on which picture is placed, glass or acrylic plate being placed over this and held in place by threads passing over its front surface and fastened at back of base plate

摘要

Picture frame comprises a backing plate (1), on which the picture (2) is placed. A glass or acrylic plate (3) is placed over this and held in place by threads (4) passing over its front surface, through bores in the base plate and fastened at the back.