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hdpe三层壁复合增强管是以聚乙烯(pe)为主要原料,采用复合增强的
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韶关hdpe三层壁复合增强管品质保障 排水管 现货供应
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hdpe三层壁复合增强管
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韶关hdpe三层壁复合增强管品质保障 排水管 现货供应
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