| http://www.w3.org/ns/prov#value | - THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description when read in conjunction with the accompanying drawings in which: FIG. 1 is a sectional view showing a copier which is an image forming unit provided in an image forming unit management system; FIG. 2 is a view showing an operation part of the co
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