The extruder is a thermoplastic processing tool that can be used to make fibers, hoses, cords and tethers out of a host of polymers. As one of the early polycraft inventories, the extruder is on the critical path toward an oil derrick, because it is necessary to make the hoses that go into it.
Is essential to create custom clothes
This shows a picture of an automated Extruder that is outfitted with 3 Pumps and 2 Pipes and three simple levers. As you can imagine, the flow networks that automate inventories like extruders can become much more complex. In this case, you want to be able to turn the pumps on and off so as not to waste fuel. You could imagine a timer circuit here for ultimate fuel savings.