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Plotting washability curve of coal based on origin7.5

HOU Ying,ZHANG Wenjun,LV Zhengchao(College of Resources and Environment Engineering,Liaoning Technical University,Fuxin 123000,China)  
In order to plot washability curve correctly and simply,this paper presents a simple new method which is based on the Origin7.5.The specific techniques is first to use the Excel for the coal pre-treatment,and then make use of the interpolation function in the built-in Origin7.5 to display the curve accurately.The results show that,through the curve,we can not only observe the better fitting results,but also get good compatibility with the AutoCAD.So we can come to the conclusion that it is an effective method in drawing the washability curves.
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