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