| http://www.w3.org/ns/prov#value | - Further in Embodiment 1, since a pair of the magnetic circuit 8a and 8b are disposed symmetrically so that the polarization directions of the magnets 5a and 5b are opposite with each other, i.e. a pair of the magnetic circuits 8a and 8b are disposed symmetrically with regard to Z axis, the leakage fluxes along Z direction of the magnetic sensor 10 disposed at the symmetric center cancel with each
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