| http://www.w3.org/ns/prov#value | - Alternatively to the hook 7, with advantages both for the simplicity of construction and for disposal and destruction of the used box, beneath the base 2 a, which may or may not be provided with the inner core 2 b and which has a central hole, a stop is provided, for example a flat or elongate element which in any case does not pass through the hole, on which the elastic band 9 coming out of the c
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