| http://www.w3.org/ns/prov#value | - ity of magnets disposed relative to said plurality of flat targets, said plurality of magnets including magnets that have the same polarity and are located on both said front surface side and said rear surface side of each of said targets along said inner circumferential edges of said targets, and magnets that have the same polarity and are located on both said front surface side and said rear sur
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