The 3D pipeline structure consists of all possible connections for reference. This clipart was completely created by stroke only which allows the simplest and easiest maintenance yet ensuring smallest possible footprint.
This simple conveyor is created by only two strokes (but not many strokes as it appears), this is achieved by having two widen strokes with dotted line style, which allows the simplest and easiest maintenance yet ensuring smallest possible footprint. Further enhancement can be made based on similar concept.