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Use of rotating magnetic fields in the case of magnet - inductive test methods for the detection of plotted in hz along - and transverse cracks, preferably in the case of longer semi-finished products and apparatus for producing such rotating fields
Use of rotating magnetic fields in the case of magnet - inductive test methods for the detection of plotted in hz along - and transverse cracks, preferably in the case of longer semi-finished products and apparatus for producing such rotating fields
