A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. A drive system is provided for the shaft with a lever attached to one end of the shaft. The top portion may provide a covering element for a person lying on the fitted portion. This can extend the output of the machine. When the same disk is played back layer, the picture quality adjustment data corresponding to the disk are read out from the first memory to execute picture quality adjustment. The platform comprises first, second and third slots.