| http://www.w3.org/ns/prov#value | - system including: a container including a base, upstanding from which are two opposed end walls and two opposed side walls; a holder including a base for supporting the container to lie substantially flat on the base of the holder, wherein upstanding from the holder base is at least one end wall and at least one side wall; at least one fixing device located on the container; at least one fixing de
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