rigid vinyl pipe fitting
硬聚氯乙烯管件 rigid vinyl pipe fitting 硬质聚氯乙烯管 rigid polyvinyl chloride pipe ..
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给水用硬聚氯乙烯管件 Unplasticized polyvnyl chloride fitting for water supply
化工用硬聚氯乙烯管件 Unplasticized polyvinyl chloride fittings for chemical industry
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