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Priority to ES25781ApriorityCriticalpatent/ES25781A1/es
Publication of ES25781A1publicationCriticalpatent/ES25781A1/es
238000010297mechanical methods and processMethods0.000title1
230000005226mechanical processes and functionsEffects0.000title1
ES25781A1900-04-041900-04-04Un procedimiento mecánico para la fabricación de los tubos de acero dulce sin soldadura "sistema Stiefel".
ExpiredES25781A1
(es)