| 摘要 |
<p>A filling is located between two or more parallel plates, in a structural element. This element provides security against forcible entry or destruction with the aid of mechanical tools, in bank chambers, money safes or security cupboards. The filling is in the form of rotatable units (4) sited in one or more layers and not displaceable sideways. These may be balls, and there is pref. such a filling for each of a number of chambers into which the space between plates (1,2) is divided, while there may be partitions between layers of balls. This enhances resistance to break-in, and damages any inserted tool.</p> |
