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The ornamental design for a roller skating apparatus, as shown and described in FIGS. 1 through 7.
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FIG. 1 is a perspective view of a roller skating apparatus showing my new design;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a rear view thereof.
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines shown in FIGS. 1-7 are for illustrative purposes only and form no part of the claimed design.
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