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求购化工废旧原料，聚醚 聚脂 TDI MDI NDI IPDI 等
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求购化工废旧原料，聚醚 聚脂 TDI MDI NDI IPDI 等
废旧聚醚
我厂常年收购废旧化工原料，聚脂 聚醚 TDI MDI NDI IPDI 辛酸亚锡 硅油 等化工废旧