A float-responsive valve includes a valve actuator that is selectively responsive to operation of a float to move from a first position to a second position in which the valve actuator holds the valve element in its open position. The self-induced first engine order of the rotating rotor shaft is transmitted through the forward and aft bearing and is then absorbed in the resilient mountings. After patterning the metal hard mask layer and the hard mask layer to form a first opening, a fluid filling material layer is formed on the hard mask layer and fills the first opening. Additional features, such as a thickness of each quantum well, can be selectedincorporated into the heterostructure to improve one or more of its characteristics. The invention replaces the all \u201c0\u201d or all \u201c1\u201d TPC command with an encoded symbol, so the reliability of a TPC command is raised and the performance of power control is improved.