SIS SS 424 02 21-1988 House wiring cables and flexible cords -PVC-insulated Al-and PVC-sheathed cable rated voltage 300 500 V type EKRK《室内布线电缆及软电线 聚氯乙烯绝缘，铝和聚氯乙烯保护套电缆，额定电压300 500 V，.pdf

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