Provided is a scanning electron microscope equipped with a high-speed and high-precision astigmatism measuring means to be used when both astigmatism generated by an electron-beam column and astigmatism generated from the surroundings of a measuring sample exist. In the ultrasonic diagnostic equipment, the ultrasonic probe includes a connector portion having a lock mechanism, and an ultrasonic probe main body. The invention conveniently reduces or eliminates the need for a merchant to purchase a dedicated communications device for EFTPOS transactions thus reducing cost. In the conductive oxynitride containing zinc and aluminum: the relative proportion of the zinc is less than or equal to 47 at. The salt adhering to the decontaminated waste is recovered by an evaporating unit, and the recovered salt is reused by the molten salt electrolysis unit.