| 摘要 |
<p>A protective device for valuable documents comprises of a volume capable of being closed and divided into two compartments (7) and (9). First compartment (7) is being used to receive the documents (8) to be protected while in the second compartment (8) caps (14) contain a pyrotechnic mixture which, when the device is wrongly manipulated, will burst into a flame which will penetrate the documents (8) in the first mentioned compartment (7).</p> |
