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Individual
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Priority to ES125977UpriorityCriticalpatent/ES125977Y/en
Publication of ES125977UpublicationCriticalpatent/ES125977U/en
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Publication of ES125977YpublicationCriticalpatent/ES125977Y/en
Welding apparatus essentially characterized by a welding rod of suitable length, heatable by means of electricity being provided with means for its displacement in verticality and mounted on a smooth support plate. (Machine-translation by Google Translate, not legally binding)
A device for the change of direction of the traction environment of an extraction device dragged throughout the carbon front. (Machine-translation by Google Translate, not legally binding)