The paper reviews the researches recently done into Nano-materials. It mainly introduces the physical and chemical preparation process of Nano-materials, and its exploitation and application.
综述了纳米材料的研究情况。介绍了目前纳米材料的物理和化学制备方法、纳米材料的开发与应用前景。
Surface preparation of metal before chemical process. Removal of a layer of the base metal.
在化学处理之前的表面准备，移除一层金属基材。
As with all chemical process used in the preparation of cotton, the relationship between temperature, length of treatment and concentration of chemical is important.
在准备棉花的所有化学加工过程中，温度，时处理的时间长度和化学品的浓度之间的关系非常重要。
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