| http://www.w3.org/ns/prov#value | - The manner in which the foregoing and other objects of the invention may best be achieved, will be fully understood from a consideration of the following detailed description taken together with the accompanying drawings, in which: FIG. 1 is a perspective view of apparatus for carrying out the method of the invention; FIG. 2 is a fragmentary sectional view of a portion of the apparatus with parts
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