The column Numbers are incremented each time gnuplot sees a new data separator.
每次gnuplot看到新的数据分隔符时，列编号就会增加。
By using this packing the extraction column, drying column and alkali separator were revamped. The separation efficiency and capacity were improved.
用于萃取塔、干燥塔和碱分离器的改造，使分离效率和能力得到改进。
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