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The ornamental design for an office chair, as shown and described. |
FIG. 1 is a perspective view of the office chair of the invention;
FIG. 2 is a front view of the office chair shown in FIG. 1;
FIG. 3 is a left side view of the office chair shown in FIG. 1;
FIG. 4 is a right side view of the office chair shown in FIG. 1;
FIG. 5 is a rear view of the office chair shown in FIG. 1; and,
FIG. 6 is a top view of the office chair shown in FIG. 1.
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