Bibliografia

1.- http://mibrazohidraulico.blogspot.com/2010/10/materiales-y-construccion-de-un-brazo.html

2.-http://www.google.cl/search?q=youtube&oq=youtube&aqs=chrome..69i57j0l5.3959j0j8&sourceid=chrome&es_sm=122&ie=UTF-8&gws_rd=ssl#q=mano+hidraulica&safe=active&tbm=vid