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Lecertua Galarza Manuel
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Lecertua Galarza Manuel
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Criba excéntrica escalonada caracterizada porque el cajón vibrador accionado por la excéntrica cuyo eje se soporta en el bastidor de fundación tiene como único elemento de sustentación sendos tacos cilíndricos de goma de considerables dimensiones, en sustitución resortes y otros medios de suspensión hasta ahora conocidos.