A rotary fluid switching valve has facewise adjacent rotor and stator faces of materials that result in an exceptionally long lifetime. A diesel machine and an associated fuel storage can be contained within a self containment device that prevents liquid to be exposed to an outside environment such as, but not limited to, a ground, a soil, a water source, vegetation, plant, trees, and the like. A fluff chamber may be disposed between the intermediate pressure zone and a lower pressure zone. , flue gases, are expanded in the first turbine, and in the second combustor syngas is burned by the gases coming from the first turbine, and the resultant hot gases are expanded in the second turbine. , of from 5 dlg to 15 dlg and from 10 to 99. The printer has a coded tag generator configured to generate coded tags based on identity data indicative of an identity associated with the interface and position data defining a relative position of each tag on the interface, and a printhead for printing the interface with the coded tags at the positions defined by the position data and having the identity data.