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Un dispositivo de avance hidráulico para el útil de taladradoras de precisión, con un manguito desplazable axialmente en una guía y un husillo porta-útil apoyado de forma giratoria en el taladro de dicho manguito, caracterizado por ser el manguito una pinola (6), que consiste en dos piezas extremas (9, 10) las cuales sirven a la vez de émbolo de avance y de cuerpo de guía en el cilíndro de presión, y en un vástago hueco (9') que une estas piezas extremas.
ES0217199A1953-09-011954-08-31UN DISPOSITIVO DE AVANCE HIDRAuLICO PARA EL uTIL DE UNA TALADRADORA DE PRECISIoN
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