求翻译：内衬聚乙烯袋、牛皮纸袋，外包装为纸板桶，每桶净重25kg是什么意思？

Lined with polyethylene bags, kraft paper bags, packaging for cardboard drum, net weight 25kg

In the headliner polyethylene bag, kraft paper bag, the packaging for the cardboard barrels, with each barrel Net weight 25 kg.

The inside lining polyethylene bag, the kraft paper sack, the outside wrapping is a fiber can, each barrel net weight 25kg

Lined with polyethylene bags, kraft paper bags, packaging cardboard barrels, barrel net weight 25kg

Appearance: colourless crystals or white powder. Hygroscopicity. Density of 2.33. At 180 ° c losing two molecular crystal water, 300 c lose all their water of crystallization. Nature and sodium pyrophosphate similar, but larger solubility. Soluble in water, insoluble in ethanol