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Priority to ES92897UpriorityCriticalpatent/ES92897Y/en
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Publication of ES92897YpublicationCriticalpatent/ES92897Y/en
New helical conveyor, characterized by the insertion on an axis of parts made up of a cylindrical body on which there is a part or a complete propeller passage, so that by successive coupling of elements, it remains constituted the helical conveyor. (Machine-translation by Google Translate, not legally binding)
Perfections contributed to the systems to perform the sealing between two especially cylindrical bodies penetrating one within the other, mainly for taps (Machine-translation by Google Translate, not legally binding)