| 摘要 |
Protective device for preventing people from looking in and pushing in breaking-in tools through the letter-box opening in the outer door or the like of a building. The device according to the invention consists of two side pieces and an upper piece connecting the latter, which together form a three-sided frame. Arranged on said frame, in a manner capable of being opened, is a front piece which can be fixed in its position locking the frame. |
