An improved control device for power factor corrections contains a voltage-raising circuit, a pulse width modulator to control the conduction of the voltage-raising circuit and an AC reference voltage circuit to control the output of the voltage-raising circuit. Some embodiments position drives in counter-rotating pairs, each simultaneously accessing half the data, such that seek-caused actuator rotational-acceleration vibration cause simultaneous canceling rotational torque. For this reason, sample measurement can be executed only by irradiating the sample from a side of the projection. The switching valve is pressed and urged to a valve seat of the flow port to close the flow port except for the communication of the narrow flow port, and the switching valve is pressed by filling pressure to open the flow port during a filling procedure of the content via the stem for allowing the content to be filled rapidly. A relief valve is installed at one of the casings.