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10.Norma NTP ISO 4435-1998 1ra Edicion
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gisperu.comgisperu.com/edu/mvcs/NTP ISO 4435-1998 1ra Edicion.pdf · Created Date: 5/11/2010 4:53:10 PM
Avances ntp
grupoaurora.pe · de colector de servicio de Ø 250 mm (Ø 10" referencial) D.N. PVC NTP ISO 4435:2005 SN2 HDPE NTP- ISO 8772-2009, SN2 PE-IOC), en reemplazo del colector existente