John Carlson in the blog “Using Multiple Bodies in Creo Parametric 7.0” discusses about the following

Starting with Creo 7.0, multiple body modeling has now come to Creo. This on-demand webcast will step you though the basics of how multiple bodies work in Creo Parametric. The good news? You don’t have to change any of your old modeling processes, but you can begin to integrate multiple bodies into them wherever it can speed up and simplify your design process. 

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