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Individual
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Individual
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Priority to ES35542ApriorityCriticalpatent/ES35542A2/es
Publication of ES35542A2publicationCriticalpatent/ES35542A2/es
Un sistema o aprovechamiento de la fuerza de contramarcha del tranvía eléctrico para producir por este medio el cambio automático del trolley de los tranvías eléctricos.