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Application filedfiledCritical
Priority to ES1978235805UpriorityCriticalpatent/ES235805Y/es
Publication of ES235805UpublicationCriticalpatent/ES235805U/es
Application grantedgrantedCritical
Publication of ES235805YpublicationCriticalpatent/ES235805Y/es
Priority to DE19782847629prioritypatent/DE2847629A1/de
Priority to IT30890/78Aprioritypatent/IT1100726B/it