- Choose Files->New, thus starting work in a new file.
- Rename the layer 'Layer0' to 'pipe1' and create two new childs child layers "inner" and "outer". Set 'pipe1//inner' as layer to use with a <Double-click>
- Choose Geometry->Create->Point and enter new point (0, 9)
- set 'pipe1//outer' as layer to use and create the new point (0, 11). Press ESC to conclude the creation of points.
- From the Copy window, select Points and Rotation. Enter an angle of 180 degrees and from the Do extrude menu, select Lines. The axis of rotation is the x axis. Enter two points defining the axis, one in First Point and the other in Second Point, for example, (0, 0, 0) and (1, 0, 0) , check Maintain layers, and set Multiple copies to 2.
- Click Select and select the two points just created. Press ESC.
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