| 摘要 |
A security device includes a security tag and a monitoring circuit for monitoring an electrical characteristic of a conductive track formed on a flexible substrate of the tag. The substrate includes an adhesive backing for bonding the substrate to a surface, the elasticity of the substrate and the bonding strength of the adhesive being selected such that, with the substrate adhesively bonded to the surface, the force required to stretch the substrate is less than the adhesive bonding force holding the substrate against the said surface.
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