For operation with an alternating current power source, the power circuit can be provided with a power conditioner for regulating the voltage and {TAIL ~ amperage} of the discharge current, and {HEAD ~ a selectively adjustable frequency regulator} for regulating the frequency of the discharge current 
For operation with an alternating current power source , the power circuit can be provided with a power conditioner for regulating the voltage and { TAIL ~ amperage } of the discharge current , and { HEAD ~ a selectively adjustable frequency regulator } for regulating the frequency of the discharge current
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