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AT136629D1932-01-231932-09-29Magnetsystem für elektromagnetische Vorrichtungen zur Umwandlung elektrischer Schwingungen in mechanische oder umgekehrt.
AT136629B
(de)
Perfeccionamientos en las instalaciones de circuitos de válvulas termoiónicas utilizables como dispositivos cronometradores eléctricos de periodicidad eléctrica.