Basically, in making the 3D object is to provide a thickness value in a field objec 2d, where the third axis of ordinate each given a value. At this opportunity I will try to make a 3d object using the command extrud pad on Autocad application. The first thing I did was I had prepared a 2d object this time I have made my elbow 2d which will be concatenated into a 3d object. You can view the video tutorial below: