| 摘要 |
The figure shows the door (1), with on one side two flat, electrically conducting layers (13,14) which are some distance apart and are connected to a current source. The distance apart is large enough to ensure that they make contact, if subjected to a charge or explosion, by simple deformation, causing an alarm. The layers are based on a metallic lattice, one layer connected to a positive and the other to a negative pole. The figures also show the panels (7,8) and the central layer (9 to 11).
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