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El 107

ACTA POLYTECHNICA SCANDINAVICA ELECTRICAL ENGINEERING SERIES No. 107

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JÚLIUS SAITZ Helsinki University of Technology Laboratory of Electromechanics P.O.Box 3000 FIN-02015 HUT Finland

Dissertation for the degree of Doctor of Science in Technology to be presented with due permission for public examination and debate in Auditorium S1 at Helsinki University of Technology (Espoo, Finland) on the 6th of November, 2001, at 12 o’clock.

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