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Individual
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Individual
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Priority to ES0042133UpriorityCriticalpatent/ES42133U/es
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Un porta-brocas perfeccionado que comprende: un útil que aloja un muelle, el cual por su presión delimita la posición de cierre de unas excéntricas dispuestas en el interior de la carcasa cuyo giro está relacionado con el de dicha carcasa exterior del útil mediante muescas practicadas al efecto.