About Hitachi Ltd., Ibaraki, JPN
About SUGAWARA H
About Hitachi Ltd., Ibaraki, JPN
About TOKISUE H
About Hitachi Ltd., Kanagawa, JPN
About KOHIRA H
About Hitachi Ltd., Kanagawa, JPN
About IEEE Transactions on Magnetics
About magnetic head
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About Electronic recording,magnetic recording,optical recording
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