Study on practical damp proof character of common packing bag of cement
常用水泥包装袋实际防潮性能的研究
Floor add environmental protection damp proof factor in the sill, absorb water person who swell to be low.
地板基材中添加环保防潮因子，吸水膨胀率更低。
All the cartons are lined with shockproof corrugated cardboard and are wrapped up with damp proof polyethylene sheets.
所有纸箱都内衬防震波状硬纸壳，外用防潮塑料纸包裹。
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