| http://www.w3.org/ns/prov#value | - ited by a current corresponding to a full-wave of the input voltage, and in case that the input voltage applied by an AC power supply is a level other than the lowest level, the heater is excited by a current substantially equal to that in the case of the input voltage of the lowest level, the current in case of the level other than the lowest level being obtained by setting a range of an applying
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