| http://www.w3.org/ns/prov#value | - The parts 2,3 are joined together, for example, by a hinge 4 or other link and can be locked one to the other by one or several needles 6,7 co-operating with a known locking device of the kind used at present at alarm tags of known kind, for example a plurality of steel balls or steel lugs acting against the needles.
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