Different simple and reliable methods have been proposed for preparing powder specimen with different particle sizes.
对于各种不同粒度的粉末试样，推荐了不同的既简便又可靠的制备方法。
The selection for acceleration of voltage and beam current has been studied in case of observation of powder specimen by SEM.
研究了用扫描电镜观察粉末试样时加速电压和束流的选择。
The paper has outlined the dispersion technology, sticking method and sputtering process for powder specimen studied by using SEM.
阐述了用扫描电镜研究粉末试样的分散技术、固定方法和镀膜技术。
应用推荐