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The ornamental design for a grille block, as shown and described. |
FIG. 1 is a side elevation view of a grille block, it being understood therefor that the opposite side is identical; and,
FIG. 2 is a left end elevation view thereof, the other end being identical thereof;
FIG. 3 is a right end elevation view thereof, the other end being identical thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a top perspective view thereof; and,
FIG. 7 is a bottom perspective view.
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