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新颁标准有: (1)GB 13663—92《给水用高密度聚乙烯(PE—HD)管材》; (2)GB 13664—92《低压输水灌溉用薄膜硬聚氯乙烯(PVC—U)管材》;
The newly issued standards are as follows: (1) GB 13663-92 High-density polyethylene (PE-HD) pipe for water supply; (2) GB 13664-92 “Low- Pipe ”