Report copyright - CDU: 621.882.082.1 MC 02.07-408 - GobCDU: 621.882.082.1 MC 02.07-408 -1-1980-0072 Norma Técnica Ecuatoriana ROSCA METRICA ISO. TOLERANCIAS. FUNDAMENTOS Y DATOS BASICOS INEN 514 1980-12
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