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MECHANICAL ELEMENT FOR SPECIAL MACHINES; COMPONENT: BALL SCREW WITH NUT; MACHINE: EUMUCO PRESS-GRINDING STATION; THE BALL SCREW'S ENDS MUST BE MACHINED ACCORDING TO THE TENARIS SI DERCA REFERENCE DRAWING 651036262; MANUFACTURER 1: NIASA; N-PART 1: KGS-4005 KGF-N-4005