A bipolar plate includes a plurality of flow channels for fuel flow, wherein the flow channels are divided into a plurality of sections along a direction of the fuel flow. The method may include forming a liner insulating layer on a surface of a gate pattern to have a first thickness. A manually rotatable member is arranged adjacent to the control handle for manually rotating the instrument shaft and working member relative to the control handle. Finally, modification of a segment of each power rail that affects wireability is performed so that required power supply to the neighboring elements remains unaffected. A second transmission arrangement connects the internal combustion engine to the differential.