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Individual
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Priority to ES0056799UpriorityCriticalpatent/ES56799Y/es
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Publication of ES56799YpublicationCriticalpatent/ES56799Y/es
Bolera perfeccionada, caracterizada por que consiste en bolos suspendidos de una pieza cilíndrica dotada de cabeza ensanchada que pende a su vez, a través de una varilla, de un cordón sin fin que rodando sobre dos poleas guías termina en un contrapeso que pesa más que la parte pendiente de la otra polea.