{TAIL ~ This readhead asymmetry} is determined by {HEAD ~ the method} of this invention, which is accomplished by measuring the output voltage pulses of the readhead when it is excited by magnetic pulses both forward and rear of its read gap 
{ TAIL ~ This readhead asymmetry } is determined by { HEAD ~ the method } of this invention , which is accomplished by measuring the output voltage pulses of the readhead when it is excited by magnetic pulses both forward and rear of its read gap
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