| 摘要 |
The invention relates to security alarm devices and can be used for warning about the modification of the position of monitored objects with respect to a user monitoring said objects. The inventive device comprises an object device which is arranged on each guarded object and is used for inquiring and emitting a signal about the presence of a corresponding object device in a monitored area, a control system used for switching on an alarm device and an information display device.
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