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Individual
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Individual
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Priority to ES0040353UpriorityCriticalpatent/ES40353U/es
Publication of ES40353UpublicationCriticalpatent/ES40353U/es
Un perforador de sierra, que esencialmente consiste en un tambor perforado axialmente, ajustable al vástago de una broca cilíndrica normal, con elementos para su sujeción a la misma, y que presenta por su base inferior una serie de canales o ranuras anulares concéntricas, en cualquiera de las cuales podrá ajustarse y fijarse, por un pasador roscado radial, un anillo de fleje de acero, con su borde inferior provisto de dientes de sierra.
ES0040353U1954-02-051954-02-05Un perforador de sierra
PendingES40353U
(es)