| http://www.w3.org/ns/prov#value | - A head for sensing magnetic data from a magnetic medium, said data recorded at a rate of about 30,000 flux changes per inch, said head comprising: a first magnetically permeable member, said member including an inner face and an end portion, said end portion to be in flux-coupling relationship to said medium, non-magnetic material adjacent the face at the end portion of said first member, a magnet
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