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Priority to ES1969148956UpriorityCriticalpatent/ES148956Y/en
Publication of ES148956UpublicationCriticalpatent/ES148956U/en
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Publication of ES148956YpublicationCriticalpatent/ES148956Y/en
Improved head that is characterized by having installed inside the piece of spongy and elastic material, a single metal frame which is fixed in turn, by a short rod, to a lockable ball joint device, which ball joint device is in sync with a rod that in a sliding and lockable arrangement, crosses through a bridge joined to the classic pincer support in these heads. (Machine-translation by Google Translate, not legally binding)