ACQUISITION OF CORRUGATED STEEL ROD fy=4200 kg/cm2 GRADE 60 OF ¼, 3/8, ½, 5/8 AND 3/4 FOR GOAL N°0036 IMPROVEMENT OF MACHINERY SERVICES IN THE OPERATING UNIT OF THE SPECIAL REGIONAL PROJECT PASTO GRANDE, POPULATED CENTER OF SAN ANTINO - ACQUISITION OF CORRUGATED STEEL fy-4200kg/cm2 GRADE 60 (EXPIRED)