| http://www.w3.org/ns/prov#value | - It is preferable that the soft magnetic member 26 is formed by any one of soft magnetic materials such as a rapidly solidifying material, casting material, rolling material, forging material, and sintering material of an amorphous alloy, permalloy, magnetic steel, sillicon steel, sendust alloy, Fe???Al alloy, or soft-magnetic ferrite and the product of the magnetic permeability and the thickness s
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