| http://www.w3.org/ns/prov#value | - As an additional further alternative, the frame 110 may be constructed in such a manner as to allow the lengths of its sides to be adjusted in the field by an operator, so that a single output tray 100 can be configured to define a plurality of differently dimensioned rectangles, according to the precise dimensions of the sheets to be stacked and other factors such as offsetting.
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