Maintaining grouping
A 3D Model consists of a set of different objects which are placed together to form a single node. However, if you put every object in the same hierarchy, then it would be very difficult to maintain, interact, and transform them in that group. That's why we follow a concept called grouping, in which related objects are brought together and put into a single group. Now you can transform, scale, and rotate that group together and easily manipulate them. To put objects into a group, just select all required object, and press Ctrl + G; that will put these objects into a new group.
The following is an example, where we have grouped different components of the inner band; this allows freedom to translate, rotate, and scale ...
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