The methods of preparing high purity iron include solvent extraction, ion exchange, electrolytic refining, zone melting, and so on.
本文介绍了溶剂萃取、离子交换、电解精炼和区域熔炼等冶金提纯方法在高纯铁制备过程中的应用。
There were many methods for preparing cobalt metal of 99.999% purity, such as extraction, membrane separation, ion exchange, electrolysis, zone melting etc.
目前制备99.999%以上金属高纯钴的制备方法很多，主要制备工艺有萃取法，膜分离法，离子交换法，电解法，区域熔炼法等方法。
Soil vapor extraction (SVE) is a cost-effective in-situ soil remediation technology being used widely abroad for removing volatile organic compounds (VOCs) from soil in the unsaturated zone.
土壤蒸气抽排是一种当前国外广泛应用的土壤现场修复技术，它能经济高效地去除非饱和带土壤中的挥发性有机污染物。
To effectively identify and interpret ambiguous zones in handwritten Chinese image, a new method for handwritten stroke extraction based on ambiguous-zone detection is proposed.
针对手写汉字笔画提取的重点和难点——模糊区域的识别和解析问题，提出了一种新的基于模糊区域检测的笔画提取算法。
We have analysed the geological hydrology state of Lingquan open-pit coal mine, and proposed the coal extraction scheme of this mine F4 shear-zone coal wall.
分析了灵泉露天煤矿地质水文状况，提出了该矿f 4断层带煤壁回采方案。
By analyzing the smoke extraction system of public zone of underground station in the urban rail transit, we proposed some methods of choosing exhausting smoke...
通过对城市轨道交通地下车站公共区排烟系统及模式的分析，提出了不同类型车站公共区排烟风机选择的方法。
By analyzing the smoke extraction system of public zone of underground station in the urban rail transit, we proposed some methods of choosing exhausting smoke...
通过对城市轨道交通地下车站公共区排烟系统及模式的分析，提出了不同类型车站公共区排烟风机选择的方法。
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