| 摘要 |
In a magnetic field detecting system having a dual-gap, magnetic flux responsive head and a magnetic flux generating source magnetized in directions across the gaps of the head, the source and head are moved relative to each other in a direction at right angles to the direction of magnetization, and such magnetization has a pattern that varies along the source considered in the direction of relative movement so that the output of the head may provide a signal of any desired wavelength limited only by the magnetization pattern.
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