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If the action is free and proper, we prove that $C^*(E)\\rtimes_r G$ is strongly Morita equivalent to $C^*(E/G)$. We define the skew product of a locally compact group $G$ by a topological graph $E$ via a cocycle $c:E^1\\to G$. The group acts freely and properly on this new topological graph $E\\times_cG$. 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