A wind turbine and a method of controlling yawing of a wind turbine are provided. The sheath includes seams 3 and grip tabs 2 and encloses the handle assembly while the handle assembly is attached to a staple mechanism housing 15. The gas forms reactive hydrogen species which removes fluorine radicals and reactive phosphorous species which forms a moisture-gettering and ion-gettering phosphorious oxide film the layer. The identifier is used to determine if the user is authorized to receive call processing system services. A second machining unit is arranged laterally next to the first machining unit in such a way that, alternating with the first machining unit, it can reach the workpieces in the working area from the same direction.