Using hemihydrate gypsum as main raw materials and frothing by gum rosin composite vesicant to produce gypsum heat preserving material.
以建筑石膏为原料,采用松香类复合发泡剂发泡制成石膏保温材料。
It has the highest gas-impermeability of any plastic, about 10,000 times that of ordinary polyethylene, which makes it an excellent material for preserving food.
在所有塑料中,它具有最高的阻气性能,大约是普通聚乙烯的10,000倍,这使它成为可用来保护食品的最佳材料。
It introduces cement stabilized soil material from matter need attention of use-process, health preserving and primary material, which has meaning in spreading application of the structure.
从使用工艺注意事项、养生原则以及原材料要求等方面对水泥稳定土材料进行了介绍,对推广应用此类结构在工程上的应用具有一定的意义。
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