A method of configuring classes in a natural language understanding system. After etching and photoresist stripping, a first plasma clean is performed. An outer sleeve is disposed concentrically around the inner sleeve, the outer sleeve being non-rotatably but axially slidably coupled to the inner sleeve. The method further includes coupling the cooling air passage, the seal tube, and the cooling air manifold in flow communication to at least partially define a turbine bucket cooling system. The guide plates and the link plates of the first and second link row are composed relatively rotatable to the connection pins. Each voltage tap node is coupled to an input node of a corresponding resistive element in voltage averaging circuit.