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GB/T13664《低压输水灌溉用薄壁硬聚氯乙烯(PVC-U)管材》作为国家标准已于2006年3月份正式发布,并于2006年10月1日正式实施。为了使产品
GB / T13664 “Thin-walled rigid polyvinyl chloride (PVC-U) pipe for low-pressure water conveyance” was officially released as a national standard in March 2006 and was put into effect on October 1, 2006. In order to make the product