| 摘要 |
A safety container, for example a strong box or safe, having rigid walls which provide safety against drilling and cutting with a torch. The wall has an external layer of heat-resistant chrome-nickel steel, and an internal wall of non-alloyed steel which are welded to a series of parallel closely-spaced ribs extending the length of the wall. The elongated pockets formed between the opposed metal layers and adjacent ribs are filled with bars of highly conductive aluminum having bodies of corundum embedded therein. |
