3D part model using array command tutorial in autocad 2019 especially for begineer

how can you create a 3d part model using an array in AutoCAD 2019 .you create a 2d circle and convert 3d using extrude and create another circle and convert 3d using extrude command. after that create another small circle and convert in 3d and using array command on the whole circle. subtract all small circle from big circle. you can see in the video of the complete process.

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[thebrownbunch]

This is so informative! Autocad is such a cool program!