A dynamo-electric machine comprises a stator having a plurality of salient poles wound with a coil, and a rotor fixed with a plurality of permanent magnets and disposed to rotate freely on an outer circumference of the stator. The first N-type MOSFET connects to the first P-type MOSFET so as to have a first connection terminal. 75-5 centimeter anterior incision is made and the femoral neck is severed from the femoral shaft and removed through the anterior incision. The liquid crystal composition has a negative dielectric anisotropy.