| 摘要 |
<p>Door fillings consist of steel wire cable networks form-locked to the door frame. They pref have elastic qualities, and can be made up from meshes, pref. interlocking and made up from a continuous cable and fixed by metal sockets. The networks are pref elastically suspended in the frame. The armoured door, revolving about pivots and also usable in sliding door or drop door form, is esp. suitable for protective functions in atomic power stations. Although light in weight, protection is provided from attempts at blowing-up or intrusion.</p> |
