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The ornamental design for playground structure, as shown. |
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FIG. 1 is a perspective view showing the front and left sides of playground structure showing our new design;
FIG. 2 is a top plan view of the structure;
FIG. 3 is a rear elevation view of the structure;
FIG. 4 is an enlarged elevation view of the left side of the structure of FIG. 1; and
FIG. 5 is an enlarged elevation view of the right side of the structure of FIG. 1.
Gibson, Charles L., Dieter, Berthold B.
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