| http://www.w3.org/ns/prov#value | - The special elements of this hook include an unusually shaped head 11 that will allow connection through the special hole shown by 2 in FIG. 3 and yet will be a retaining joint so that the combination of elements such as those of FIG. 1, FIG. 3, and FIG. 6 will be constrained as a chain allowing one to pick up a combination or array of elements, such as described in FIG. 5, without these elements
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