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Individual
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Priority to ES92527UpriorityCriticalpatent/ES92527Y/en
Publication of ES92527UpublicationCriticalpatent/ES92527U/en
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Publication of ES92527YpublicationCriticalpatent/ES92527Y/en
A new type of graduable shutter, characterized by consisting of a series of slats joined by metal flanges. (Machine-translation by Google Translate, not legally binding)