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地下室止水穿墻螺絲桿套PVC管做法有規范嗎？

發布者：鳳凰新聞網發布時間：2018-07-25 06:04:36 訪問次數：50

目前，國內的食品包裝袋一般可分為單膜袋和復合薄膜包裝袋兩大類。其主要執行標準有：GB/T4456-1996《包裝用聚乙烯吹塑薄膜》、GB12025-1989《高密度聚乙烯吹塑薄膜》、QB/T2461-1999《包裝用降解聚乙烯薄膜》、GB9687-1988《食品包裝用聚乙烯成型品衛生標準》、GB9688-1988《食品包裝用聚丙烯成型品衛生標準》等。

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來源：鳳凰新聞網

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