| http://www.w3.org/ns/prov#value | - nd embodiment of the present invention, andFIGS. 11 to 15 are schematic front elevational views respectively showing specific examples of photoelectric detectors according to a third embodiment of the present invention.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTReferring now to the drawings, particularly to FIGS. 1 through 8, there is shown in FIG. 1, a fault detecting apparatus for transpare
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